Exhibit 99.18
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k) under the Securities Exchange Act of
1934, as amended, the undersigned hereby agree that the attached Schedule 13D is
filed on behalf of each of them. The undersigned agree to the joint filing of
such Schedule 13D and all amendments thereto and further agree as follows:
Each of the undersigned is responsible for the timely filing of such
Schedule 13D and any amendments thereto, and for the completeness and accuracy
of the information concerning such person contained therein; but neither of the
undersigned is responsible for the completeness or accuracy of the information
concerning the other person executing this joint filing agreement, unless he
knows or has reason to believe that such information concerning the other person
is inaccurate.
IN WITNESS WHEREOF, the undersigned hereby execute this agreement on
June 17, 2003.
/s/ Xxxxxx X. XxXxxxxxx
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XXXXXX X. XxXXXXXXX, an individual
CHESAPEAKE INVESTMENTS, an Oklahoma
Limited Partnership
By: /s/ Xxxxxx X. XxXxxxxxx
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Xxxxxx X. XxXxxxxxx, General Partner
/s/ Xxx X. Xxxx
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XXX X. XXXX, an individual
TLW INVESTMENTS INC., an Oklahoma
corporation
By: /s/ Xxx X. Xxxx
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Xxx X. Xxxx, President
