Exhibit 3.12

                                     BY-LAWS

                                       OF

                       NORTH AMERICAN TRAVEL SERVICE, INC.

                              ARTICLE I -- OFFICES

      The principal office of the corporation in the State of          shall be
located in the City of New Haven, County of Allen. The corporation may have such
other offices, either within or without the State of incorporation as the board
of directors may designate or as the business of the corporation may from time
to time require.

                           ARTICLE II -- STOCKHOLDERS

1. ANNUAL MEETING.

      The annual meeting of the stockholders shall be held on the 1st day of
December in each year, beginning with the year 1977 at the hour 10 o'clock A.M.,
for the purpose of electing directors and for the transaction of such other
business as may come before the meeting. If the day fixed for the annual meeting
shall be a legal holiday such meeting shall be held on the next succeeding
business day.

2. SPECIAL MEETINGS.

      Special meetings of the stockholders, for any purpose or purposes, unless
otherwise prescribed by statute, may be called by the president or by the
directors, and shall be called by the president at the request of the holders of
not less than 50 per cent of all the outstanding shares of the corporation
entitled to vote at the meeting.

3. PLACE OF MEETING.

      The directors may designate any place, either within or without the State
unless otherwise prescribed by statute, as the place of meeting for any annual
meeting or for any special meeting called by the directors. A waiver of notice
signed by all stockholders entitled to vote at a meeting may designate


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any place, either within or without the state unless otherwise prescribed by
statute, as the place for holding such meeting. If no designation is made, or if
a special meeting be otherwise called, the place of meeting shall be the
principal office of the corporation.

4. NOTICE OF MEETING.

      Written or printed notice stating the place, day and hour of the meeting
and, in case of a special meeting, the purpose or purposes for which the meeting
is called, shall be delivered not less than 10 nor more than 30 days before the
date of the meeting, either personally or by mail, by or at the direction of the
president, or the secretary, or the officer or persons calling the meeting, to
each stockholder of record entitled to vote at such meeting. If mailed, such
notice shall be deemed to be delivered when deposited in the United States mail,
addressed to the stockholder at his address as it appears on the stock transfer
books of the corporation, with postage thereon prepaid.

5. CLOSING OF TRANSFER BOOKS OR FIXING OF RECORD DATE.

      For the purpose of determining stockholders entitled to notice of or to
vote at any meeting of stockholders or any adjournment thereof, or stockholders
entitled to receive payment of any dividend, or in order to make a determination
of stockholders for any other proper purpose, the directors of the corporation
may provide that the stock transfer books shall be closed for a stated period
but not to exceed, in any case, 30 days. If the stock transfer books shall be
closed for the purpose of determining stockholders entitled to notice of or to
vote at a meeting of stockholders, such books shall be closed for at least 10
days immediately preceding such meeting. In lieu of closing the stock transfer
books, the directors may fix in advance a date as the record date for any such
determination of stockholders, such date in any case to be not more than 30 days
and, in case of a meeting of stockholders, not less than 30 days prior to the
date on which the particular action requiring such determination of stockholders
is to be taken. If the stock transfer books are not closed and no record date is
fixed for the determination of stockholders entitled to notice of or to vote at
a meeting of stockholders, or stockholders entitled to receive payment of a
dividend, the date on which notice of the meeting is mailed or the date on which
the resolution of the directors declaring such dividend is adopted, as the case
may be, shall be the record date for such determination of stockholders. When a
determination of stockholders entitled to vote at any meeting of stockholders


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has been made as provided in this section, such determination shall apply to any
adjournment thereof.

6. VOTING LISTS.

      The officer or agent having charge of the stock transfer books for shares
of the corporation shall make, at least 10 days before each meeting of
stockholders, a complete list of the stockholders entitled to vote at such
meeting, or any adjournment thereof, arranged in alphabetical order, with the
address of and the number of shares held by each, which list, for a period of 10
days prior to such meeting, shall be kept on file at the principal office of the
corporation and shall be subject to inspection by any stockholder at any time
during usual business hours. Such list shall also be produced and kept open at
the time and place of the meeting and shall be subject to the inspection of any
stockholder during the whole time of the meeting. The original stock transfer
book shall be prima facie evidence as to who are the stockholders entitled to
examine such list or transfer books or to vote at the meeting of stockholders.

7. QUORUM.

      At any meeting of stockholders 50 percent of the outstanding shares of the
corporation entitled to vote, represented in person or by proxy, shall
constitute a quorum at a meeting of stockholders. If less than said number of
the outstanding shares are represented at a meeting, a majority of the shares so
represented may adjourn the meeting from time to time without further notice. At
such adjourned meeting at which a quorum shall be present or represented, any
business may be transacted which might have been transacted at the meeting as
originally notified. The stockholders present at a duly organized meeting may
continue to transact business until adjournment, notwithstanding the withdrawal
of enough stockholders to leave less than a quorum.

8. PROXIES.

      At all meetings of stockholders, a stockholder may vote by proxy executed
in writing by the stockholder or by his duly authorized attorney in fact. Such
proxy shall be filed with the secretary of the corporation before or at the time
of the meeting.

9. VOTING.

      Each stockholder entitled to vote in accordance with the terms and
provisions of the certificate of incorporation and these by-laws shall be
entitled to one vote, in person or by


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proxy, for each share of stock entitled to vote held by such stockholders. Upon
the demand of any stockholder, the vote for directors and upon any question
before the meeting shall be by ballot. All elections for directors shall be
decided by plurality vote; all other questions shall be decided by majority vote
except as otherwise provided by the Certificate of Incorporation or the laws of
this State.

10. ORDER OF BUSINESS.

      The order of business at all meetings of the stockholders, shall be as
follows:

      1. Roll Call.

      2. Proof of notice of meeting or waiver of notice.

      3. Reading of minutes of preceding meeting.

      4. Reports of Officers.

      5. Reports of Committees.

      6. Election of Directors.

      7. Unfinished Business.

      8. New Business.

11. INFORMAL ACTION BY STOCKHOLDERS.

      Unless otherwise provided by law, any action required to be taken at a
meeting of the shareholders, or any other action which may be taken at a meeting
of the shareholders, may be taken without a meeting if a consent in writing,
setting forth the action so taken, shall be signed by all of the shareholders
entitled to vote with respect to the subject matter thereof.


                                    By-Laws 4


                        ARTICLE III -- BOARD OF DIRECTORS

1. GENERAL POWERS.

      The business and affairs of the corporation shall be managed by its board
of directors. The directors shall in all cases act as a board, and they may
adopt such rules and regulations for the conduct of their meetings and the
management of the corporation, as they may deem proper, not inconsistent with
these by-laws and the laws of this State.

2. NUMBER, TENURE AND QUALIFICATIONS.

      The number of directors of the corporation shall be three. Each director
shall hold office until the next annual meeting of stockholders and until his
successor shall have been elected and qualified.

3. REGULAR MEETINGS.

      A regular meeting of the directors, shall be held without other notice
than this by-law immediately after, and at the same place as, the annual meeting
of stockholders. The directors may provide, by resolution, the time and place
for the holding of additional regular meetings without other notice than such
resolution.

4. SPECIAL MEETINGS.

      Special meetings of the directors may be called by or at the request of
the president or any two directors. The person or persons authorized to call
special meetings of the directors may fix the place for holding any special
meeting of the directors called by them.

5. NOTICE.

      Notice of any special meeting shall be given at least ten days previously
thereto by written notice delivered personally, or by telegram or mailed to each
director at his business address. If mailed, such notice shall be deemed to be
delivered when deposited in the United States mail so addressed, with postage
thereon prepaid. If notice be given by telegram, such notice shall be deemed to
be delivered when the telegram is delivered to the telegraph company. The
attendance of a director at a meeting shall constitute a waiver of notice of
such meeting, except where a director attends a meeting for the express purpose
of objecting to the transaction of any business because the meeting is not
lawfully called or convened.


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6. QUORUM.

      At any meeting of the directors, two shall constitute a quorum for the
transaction of business, but if less than said number is present at a meeting, a
majority of the directors present may adjourn the meeting from time to time
without further notice.

7. MANNER OF ACTING.

      The act of the majority of the directors present at a meeting at which a
quorum is present shall be the act of the directors.

8. NEWLY CREATED DIRECTORSHIPS AND VACANCIES.

      Newly created directorships resulting from an increase in the number of
directors and vacancies occurring in the board for any reason except the removal
of directors without cause may be filled by a vote of a majority of the
directors then in office, although less than a quorum exists. Vacancies
occurring by reason of the removal of directors without cause shall be filled by
vote of the stockholders. A director elected to fill a vacancy caused by
resignation, death or removal shall be elected to hold office for the unexpired
term of his predecessor.

9. REMOVAL OF DIRECTORS.

      Any or all of the directors may be removed for cause by vote of the
stockholders or by action of the board. Directors may be removed without cause
only by vote of the stockholders.

10. RESIGNATION.

      A director may resign at any time by giving written notice to the board,
the president or the secretary of the corporation. Unless otherwise specified in
the notice, the resignation shall take effect upon receipt thereof by the board
or such officer, and the acceptance of the resignation shall not be necessary to
make it effective.

11. COMPENSATION.

      No compensation shall be paid to directors, as such, for their services,
but by resolution of the board a fixed sum and expenses for actual attendance at
each regular or special meeting of the board may be authorized. Nothing herein
contained shall be construed to preclude any director from serving the
corporation in any other capacity and receiving compensation therefor.


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12. PRESUMPTION OF ASSENT.

      A director of the corporation who is present at a meeting of the directors
at which action on any corporate matter is taken shall be presumed to have
assented to the action taken unless his dissent shall be entered in the minutes
of the meeting or unless he shall file his written dissent to such action with
the person acting as the secretary of the meeting before the adjournment thereof
or shall forward such dissent by registered mail to the secretary of the
corporation immediately after the adjournment of the meeting. Such right to
dissent shall not apply to a director who voted in favor of such action.

13. EXECUTIVE AND OTHER COMMITTEES.

      The board, by resolution, may designate from among its members an
executive committee and other committees, each consisting of three or more
directors. Each such committee shall serve at the pleasure of the board.

14. INFORMAL ACTION BY DIRECTORS.

      Unless otherwise provided by law, any action required to be taken at a
meeting of the directors, or any other action which may be taken at a meeting of
the directors, may be taken without a meeting if a consent in writing, setting
forth the action so taken, shall be signed by all the directors entitled to vote
with respect to the subject matter thereof.


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                             ARTICLE IV -- OFFICERS

1. NUMBER.

      The officers of the corporation shall be a president, a vice-president, a
secretary and a treasurer, each of whom shall be elected by the directors. Such
other officers and assistant officers as may be deemed necessary may be elected
or appointed by the directors.

2. ELECTION AND TERM OF OFFICE.

      The officers of the corporation to be elected by the directors shall be
elected annually at the first meeting of the directors held after each annual
meeting of the stockholders. Each officer shall hold office until his successor
shall have been duly elected and shall have qualified or until his death or
until he shall resign or shall have been removed in the manner hereinafter
provided.

3. REMOVAL.

      Any officer or agent elected or appointed by the directors may be removed
by the directors whenever in their judgment the best interests of the
corporation would be served thereby, but such removal shall be without prejudice
to the contract rights, if any, of the person so removed.

4. VACANCIES.

      A vacancy in any office because of death, resignation, removal,
disqualification or otherwise, may be filled by the directors for the unexpired
portion of the term.

5. PRESIDENT.

      The president shall be the principal executive officer of the corporation
and, subject to the control of the directors, shall in general supervise and
control all of the business and affairs of the corporation. He shall, when
present, preside at all meetings of the stockholders and of the directors. He
may sign, with the secretary or any other proper officer of the corporation
thereunto authorized by the directors, certificates for shares of the
corporation, any deeds, mortgages, bonds, contracts, or other instruments which
the directors have authorized to be executed, except in cases where the signing
and execution thereof shall be expressly delegated by the directors or by these
by-laws to some other officer or agent of the corporation, or shall be required
by law to be otherwise signed or executed; and in general shall


                                    By-Laws 8


perform all duties incident to the office of president and such other duties as
may be prescribed by the directors from time to time.

6. VICE-PRESIDENT.

      In the absence of the president or in event of his death, inability or
refusal to act, the vice-president shall perform the duties of the president,
and when so acting, shall have all the powers of and be subject to all the
restrictions upon the president. The vice-president shall perform such other
duties as from time to time may be assigned to him by the President or by the
directors.

7. SECRETARY.

      The secretary shall keep the minutes of the stockholders' and of the
directors' meetings in one or more books provided for that purpose, see that all
notices are duly given in accordance with the provisions of these by-laws or as
required, be custodian of the corporate records and of the seal of the
corporation and keep a register of the post office address of each stockholder
which shall be furnished to the secretary by such stockholder, have general
charge of the stock transfer books of the corporation and in general perform all
duties incident to the office of secretary and such other duties as from time to
time may be assigned to him by the president or by the directors.

8. TREASURER.

      If required by the directors, the treasurer shall give a bond for the
faithful discharge of his duties in such sum and with such surety or sureties as
the directors shall determine. He shall have charge and custody of and be
responsible for all funds and securities of the corporation; receive and give
receipts for moneys due and payable to the corporation from any source
whatsoever, and deposit all such moneys in the name of the corporation in such
banks, trust companies or other depositories as shall be selected in accordance
with these by-laws and in general perform all of the duties incident to the
office of treasurer and such other duties as from time to time may be assigned
to him by the president or by the directors.

9. SALARIES.

      The salaries of the officers shall be fixed from time to time by the
directors and no officer shall be prevented from receiving such salary by reason
of the fact that he is also a director of the corporation.


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10. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

(a) Each director and officer, elected or appointed, shall be entitled, without
the necessity of further act or deed on the part of himself or the corporation
to be indemnified by the corporation from and against any and all claims,
liabilities, fines or penalties, whether or not reduced to judgment, imposed
upon or asserted against him by reason of his being or having been a director or
officer of the corporation or otherwise, and also from and against all costs and
expenses (including, without any limitation of the foregoing, fees and
disbursements of counsel) reasonably incurred by him as a result thereof,
whether in settlement of the same or in connection with any action, suit or
proceeding to which he is now or may hereafter become or be made a party for a
like reason; provided, however, that such indemnification shall not extend to
any instance in which

      (i)   any liability, fine or penalty is imposed upon him by final judgment
            of a court of competent jurisdiction or the claims against him are
            dismissed or barred upon the ground of any statute of limitations or
            of any other technical defense not going to the merits of the claims
            involved, unless the court shall find that the liability, fine or
            penalty so imposed or the claims so dismissed or barred resulted
            from action taken or omitted to be taken by him in good faith and
            without negligence or misconduct in the performance of his duty or,
            in the absence of such a finding, unless counsel selected or
            approved by the board of directors shall have advised the
            corporation that in the opinion of such counsel such liability, fine
            or penalty or such claims resulted from action taken or omitted to
            be taken by him in good faith and without negligence or misconduct
            in the performance of his duty; or

      (ii)  any amount is paid or is to be paid by him to the corporation in or
            in connection with the settlement of any action, suit, proceeding or
            claim, with or without the entry of any judgment therein or in
            respect thereof by a court of competent jurisdiction; or


                                  By-Laws 9(a)


      (iii) any amount is paid or is to be paid by him to any party other than
            the corporation in or in connection with the settlement of any
            action, suit, proceeding or claim, with or without the entry of any
            judgment therein or in respect thereof by a court of competent
            jurisdiction, unless such court shall find that such director or
            officer acted in good faith and without negligency or misconduct in
            the performance of his duty, or unless, in the absence of such
            finding, the corporation shall be advised by counsel selected or
            approved by the board that in the opinion of such counsel such
            action, suit, proceeding or claim is without substantial merit or
            that such director or officer acted in good faith and without
            negligence or misconduct in the performance of his duty with respect
            to the matters involved therein, but in no event shall the amount of
            the indemnity under this subdivision (iii) exceed the expense which
            might, in the judgment of the board, reasonably be incurred by such
            director of officer in conducting his defense to a final conclusion;

nor shall such indemnification extend to any costs or expenses in connection
with any case referred to in clause (i), (ii) and (iii) above.

(b) The corporation's obligation aforesaid (i) shall exist whether or not a
director or officer is or has continued to be a director or officer of the
corporation at or up to the time any costs or expenses are incurred or any
claims or liabilities arise or any settlement is effected, (ii) shall inure to
the benefit of the heirs, executors or administrators of such director or
officer, (iii) shall not be exclusive as a matter of law, and (iv) may, but need
not, be evidenced by a writing to be delivered to him in connection with his
election or appointment as such director and/or officer and in consideration of
his acceptance of the same. Notwithstanding any repeal of this Section or other
amendment of these By-Laws affecting or purporting to affect this Section or the
indemnification herein provided, such obligation shall be binding upon the
corporation (subject only to the exceptions hereinbefore set forth) as to all
matters which occur during or are allocable to the period prior to any such
repeal or amendment and shall cover all


                                  By-Laws 9(b)


claims, liabilities, costs and expenses at any time connected therewith, and
also any settlement thereof, as hereinabove stated.

(c) In determining whether and to what extent, if any, a director or officer of
the corporation is entitled to indemnification hereunder or under any writing
aforesaid and in making any payments pursuant to such determination, the board
of directors and/or each director and officer, whether or not interested in any
such determination or payment, may rely upon, and shall be protected by, an
opinion of counsel selected or approved by the board, which counsel may, but
need not, be counsel advising as above mentioned. In the selection of counsel
for any one or more of the purposes hereinabove set forth, the determination of
the board shall be final and binding, notwithstanding that one or more, or all,
of the directors taking part in such selection are or were interested in any
payment or indemnification to which claim is made hereunder.


                                  By-Laws 9(c)


               ARTICLE V -- CONTRACTS, LOANS, CHECKS AND DEPOSITS

1. CONTRACTS.

      The directors may authorize any officer or officers, agent or agents, to
enter into any contract or execute and deliver any instrument in the name of and
on behalf of the corporation, and such authority may be general or confined to
specific instances.

2. LOANS.

      No loans shall be contracted on behalf of the corporation and no evidences
of indebtedness shall be issued in its name unless authorized by a resolution of
the directors. Such authority may be general or confined to specific instances.

3. CHECKS, DRAFTS, ETC.

      All checks, drafts or other orders for the payment of money, notes or
other evidences of indebtedness issued in the name of the corporation, shall be
signed by such officer or officers, agent or agents of the corporation and in
such manner as shall from time to time be determined by resolution of the
directors.

4. DEPOSITS.

      All funds of the corporation not otherwise employed shall be deposited
from time to time to the credit of the corporation in such banks, trust
companies or other depositaries as the directors may select.

            ARTICLE VI -- CERTIFICATES FOR SHARES AND THEIR TRANSFER

1. CERTIFICATES FOR SHARES.

      Certificates representing shares of the corporation shall be in such form
as shall be determined by the directors. Such certificates shall be signed by
the president and by the secretary or by such other officers authorized by law
and by the directors. All certificates for shares shall be consecutively
numbered or otherwise identified. The name and address of the stockholders, the
number of shares and date of issue, shall be entered on the stock transfer books
of the corporation. All certificates surrendered to the corporation for transfer
shall be canceled and no new certificate shall be issued until the


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former certificate for a like number of shares shall have been surrendered and
canceled, except that in case of a lost, destroyed or mutilated certificate a
new one may be issued therefor upon such terms and indemnity to the corporation
as the directors may prescribe.

2. TRANSFERS OF SHARES.

      (a) Upon surrender to the corporation or the transfer agent of the
corporation of a certificate for shares duly endorsed or accompanied by proper
evidence of succession, assignment or authority to transfer, it shall be the
duty of the corporation to issue a new certificate to the person entitled
thereto, and cancel the old certificate; every such transfer shall be entered on
the transfer book of the corporation which shall be kept at its principal
office.

      (b) The corporation shall be entitled to treat the holder of record of any
share as the holder in fact thereof, and, accordingly, shall not be bound to
recognize any equitable or other claim to or interest in such share on the part
of any other person whether or not it shall have express or other notice
thereof, except as expressly provided by the laws of this state.

                           ARTICLE VII -- FISCAL YEAR

      The fiscal year of the corporation shall begin on the first day of January
in each year.

                            ARTICLE VIII -- DIVIDENDS

      The directors may from time to time declare, and the corporation may pay,
dividends on its outstanding shares in the manner and upon the terms and
conditions provided by law.

                               ARTICLE IX -- SEAL

      The directors shall provide a corporate seal which shall be circular in
form and shall have inscribed thereon the name of the corporation, the state of
incorporation, year of incorporation and the words, "Corporate Seal".


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                          ARTICLE X -- WAIVER OF NOTICE

      Unless otherwise provided by law, whenever any notice is required to be
given to any stockholder or director of the corporation under the provisions of
these by-laws or under the provisions of the articles of incorporation, a waiver
thereof in writing, signed by the person or persons entitled to such notice,
whether before or after the time stated therein, shall be deemed equivalent to
the giving of such notice.

                            ARTICLE XI -- AMENDMENTS

      These by-laws may be altered, amended or repealed and new by-laws may be
adopted by a vote of the stockholders representing a majority of all the shares
issued and outstanding, at any annual stockholders' meeting or at any special
stockholders' meeting when the proposed amendment has been set out in the notice
of such meeting.

      These by-laws may also be altered, amended or repealed and new by-laws
may be adopted by a vote of the majority of the directors at either an annual
meeting, a special meeting, or by consent as provided in Article III, Section 14
hereof.


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