JOINT FILING AGREEMENT
EXHIBIT 99.1 JOINT FILING AGREEMENT The undersigned stockholders of Xxxxxx Exploration Company, a Deleware corporation, hereby consent to the joint filing of a Schedule 13(g) in accordance with Rule 13d-1(f)(1) of the Securities Exchange Act of 1934. Date: February 18, 1998 /S/ XXX XXXXX XXXX Xxx Xxxxx Xxxx XXX X. XXXX TRUST By /S/ XXX XXXXX XXXX Xxx Xxxxx Xxxx, Trustee FRONTIER INVESTMENTS, INC. XXX X. XXXX TRUST By /S/ XXX XXXXX XXXX Xxx Xxxxx Xxxx, Trustee