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                                                                    Exhibit 3.10


                                     BYLAWS

                               CCIR OF TEXAS CORP.

                          Adopted as of March 27, 1997

                             ARTICLE I SHAREHOLDERS

         Section 1. Annual Meeting. The annual meeting of the shareholders shall
be held in the month of December in each year or at such other time as shall be
fixed by the Board of Directors, for the purpose of electing directors and for
the transaction of such other business as may come before the meeting.

         Section 2. Notice of Meeting. Written 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, unless otherwise prescribed by statute,
be delivered not less than ten (10) nor more than sixty (60) days before the
date of the meeting, either personally or by mail, or at the direction of the
president, or the secretary, or the officer or other persons calling the
meeting.

                          ARTICLE II BOARD OF DIRECTORS

         Section 1. Number, Tenure and Qualifications. The number of directors
of the corporation shall be not less than one (1) nor more than four (4) as
established by the Board of Directors from time to time. Each director shall
hold office until the next annual meeting of shareholders and until his
successor shall have been elected and qualified. Directors need not be residents
of the State of Texas or shareholders of the corporation.

         Section 2. Regular and Special Meetings. The Board of Directors may
call regular and special meetings.

                              ARTICLE III OFFICERS

         Section 1. Number. The officers of the corporation shall be a
president, vice president, a secretary and a treasurer, all of whom shall be
elected or appointed by the Board of Directors. Such other officers and
assistant officers as may be deemed necessary may be elected or appointed by the
Board of Directors. Any two or more offices may be held by the same person.

         Section 2. Election and Term of Office. The officers of the corporation
shall be elected annually by the Board of Directors. Each officer shall hold
office until his successor shall have been elected and shall have qualified or
until his death or until he shall resign or shall have been removed in the
manner hereinafter provided.

                             ARTICLE IV FISCAL YEAR

         The fiscal year of the corporation shall begin on the 1st day of August
and end on the 31st day of July each year.