1
EXHIBIT 99.1
AGREEMENT MADE PURSUANT TO
RULE 13d-1(f)(1)(iii)
2
JOINT FILING AGREEMENT
The parties hereto agree that pursuant to Rule 13d-1(f)(1)(iii) of
Regulation 13D promulgated by the Securities and Exchange Commission pursuant
to the Securities Exchange Act of 1934, as amended, the Schedule 13D of which
this Agreement is made an exhibit is filed on behalf of it in the capacity set
forth below.
Date: November 3, 1997 NATURAL GAS PARTNERS, L.P.
By: G.F.W. Energy, L.P.,
its Sole General Partner
By: /s/ X. Xxxxxx Xxxxxxx
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X. Xxxxxx Xxxxxxx,
General Partner
Date: November 3, 1997 G.F.W. ENERGY, L.P.
By: /s/ X. Xxxxxx Xxxxxxx
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X. Xxxxxx Xxxxxxx,
General Partner
