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            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9

GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER -- Social Security numbers have nine digits separated by two hyphens:
i.e., 000-00-0000. Employer identification numbers have nine digits separated by
only one hyphen: i.e., 00-0000000. The table below will help determine the
number to give the payer.



- ------------------------------------------------------
                                GIVE THE NAME AND
                                 SOCIAL SECURITY
FOR THIS TYPE OF ACCOUNT:           NUMBER OF-
- ------------------------------------------------------
                         
1. Individual               The individual
2. Two or more individuals  The actual owner of the
   (joint account)          account or, if combined
                            funds, any one of the
                            individuals(1)
3. Custodian account of a   The minor(2)
   minor (Uniform Gift to
   Minors Act)
4. a. The usual revocable   The grantor-trustee(1)
      savings trust
      (grantor is also
      trustee)
  b. So-called trust        The actual owner(1)
     account that is not a
     legal or valid trust
     under State law
5. Sole proprietorship      The owner(3)

- ------------------------------------------------------




- ------------------------------------------------------
                                GIVE THE NAME AND
                                     EMPLOYER
                                  IDENTIFICATION
FOR THIS TYPE OF ACCOUNT:           NUMBER OF-
- ------------------------------------------------------
                         
 6. Sole proprietorship     The owner(3)
 7. A valid trust, estate,  Legal entity(1)
    or pension trust
 8. Corporate               The corporation
 9. Association, club,      The organization
    religious, charitable,
    educational or other
    tax-exempt
    organization
10. Partnership             The partnership
11. A broker or registered  The broker or nominee
    nominee
12. Account with the        The public entity
    Department of
    Agriculture in the
    name of a public
    entity (such as a
    state or local
    government, school
    district, or prison)
    that receives
    agricultural program
    payments
- ------------------------------------------------------


(1) List first and circle the name of the person whose number you furnish. If
    only one person on a joint account has a social security number, that
    person's number must be furnished.
(2) Circle the minor's name and furnish the minor's social security number.
(3) You must show your individual name, but you may also enter your business or
    "doing business as" name. You may use either your social security number or
    employer identification number (if you have one).
(4) List first and circle the name of the legal trust, estate, or pension trust.

Do not furnish the identifying number of the personal representative or trustee
unless the legal entity itself is not designated in the account title.

NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.
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            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
                                     PAGE 2

OBTAINING A NUMBER

    If you don't have a taxpayer identification number or you don't know your
number, obtain Internal Revenue Service Form SS-5, Application for a Social
Security Number Card, or Form SS-4, Application for Employer Identification
Number, at your local office of the Social Security Administration or the
Internal Revenue Service and apply for a number.

PAYEES EXEMPT FROM BACKUP WITHHOLDING

    Payees specifically exempted from backup withholding on ALL payments include
the following:

- - A corporation.

- - financial institution.

- - An organization exempt from tax under section 501(a), or an individual
  retirement plan.

- - The United States or any agency or instrumentality thereof.

- - A State, the District of Columbia, a possession of the United States, or any
  subdivision or instrumentality thereof.

- - A foreign government, a political subdivision of a foreign government, or any
  agency or instrumentality thereof.

- - An international organization, or any agency or instrumentality thereof.

- - A registered dealer in securities or commodities registered in the U.S. or a
  possession of the U.S.

- - A real estate investment trust.

- - A common trust fund operated by a bank under section 584(a).

- - An exempt charitable remainder trust, or a non-exempt trust described in
  section 4947(a)(1).

- - An entity registered at all times under the Investment Company Act of 1940.

- - A foreign central bank of issue.

- - A middleman known in the investment community as a nominee or who is listed in
  the most recent publication of the American Society of Corporate Secretaries,
  Inc., Nominee List.

    Payments of dividends and patronage dividends not generally subject to
backup withholding include the following:

- - Payments to nonresident aliens subject to withholding under section 1441.

- - Payments to partnerships not engaged in a trade or business in the U.S. and
  which have at least one nonresident partner.

- - Payments of patronage dividends where the amount received is not paid in
  money.

- - Payments made by certain foreign organizations.

- - Payments made to a nominee.

    Payments of interest not generally subject to backup withholding include the
following:

- - Payments of interest on obligations issued by individuals. Note: You may be
  subject to backup withholding if this interest is $600 or more and is paid in
  the course of the payer's trade or business and you have not provided your
  correct taxpayer identification number to the payer.

- - Payments of tax-exempt interest (including exempt-interest dividends under
  section 852).

- - Payments described in section 6049(b)(5) to nonresident aliens.

- - Payments on tax-free covenant bonds under section 1451.

- - Payments made by certain foreign organizations.

- - Payments made to a nominee.

    Exempt payees described above should file Form W-9 to avoid possible
erroneous backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR
TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, AND
RETURN IT TO THE PAYER. IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE
DIVIDENDS, ALSO SIGN AND DATE THE FORM. IF YOU ARE A NONRESIDENT ALIEN OR A
FOREIGN ENTITY NOT SUBJECT TO BACKUP WITHHOLDING, FILE WITH PAYER A COMPLETED
INTERNAL REVENUE FORM W-8 (CERTIFICATE OF FOREIGN STATUS).

    Certain payments other than interest dividends, and patronage dividends,
that are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under sections 6041, 6041A(a),
6045, and 6050A.

    PRIVACY ACT NOTICE. -- Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payers
who must report the payments to IRS. IRS uses the numbers for identification
purposes. Payers must be given the numbers whether or not recipients are
required to file tax returns. Beginning January 1, 1984, payers must generally
withhold 31% of taxable interest, dividend, and certain other payments to a
payee who does not furnish a taxpayer identification number to a payer. Certain
penalties may also apply.

PENALTIES

    (1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER. -- If you
fail to furnish your taxpayer identification number to a payer, you are subject
to a penalty of $50 for each such failure unless your failure is due to
reasonable cause and not to willful neglect.

    (2) FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS. -- If you fail
to include any portion of an includible payment for interest, dividends, or
patronage dividends in gross income, such failure will be treated as being due
to negligence and will be subject to a penalty of 5% on any portion of an
under-payment attributable to that failure unless there is clear and convincing
evidence to the contrary.

    (3) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. -- If
you make a false statement with no reasonable basis which results in no
imposition of backup withholding, you are subject to a penalty of $500.

    (4) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- Falsifying
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.

FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL REVENUE
SERVICE.