• Texhoma Energy Inc
• Arrowhead Oil & Gas LLC
• Desert Mining Inc
• Ascent Energy Inc
• Transmeridian Exploration Inc
• Galaxy Energy Corp
• Foothills Resources Inc
• Primewest Energy Trust
• Mewbourne Energy Partners 01-A LP
• Assure Energy Inc
• Mewbourne Energy Partners 02-A LP
• Texas Standard Oil Co
• Wentworth Energy, Inc.
• New Frontier Energy Inc
• Kerr McGee Corp
• Pedevco Corp.
• Nomac Drilling LLC
• Anadarko Finance Co
• Tri Union Development Corp
• Gfy Foods Inc
• Houston American Energy Corporation
• Pemex Project Funding Master Trust
• Fidelis Energy Inc
• Encana Corp
• Gas & Oil Technology Inc
• C2E Energy Inc
• Cygnus Oil & Gas Corp
• Prairie Operating Co.
• Petrobras International Finance Co
• Daybreak Oil & Gas, Inc.
• GB Sciences Inc
• Markwest Energy Partners L P
• Antry Lisa L & Steve A
• Falcon Natural Gas Corp
• Dynegy Energy Partners LP
• Cimarex Energy Co
• Pacific Energy Partners LP
• Gastar Exploration, Inc.
• Mewbourne Energy Partners 03-A LP
• Bill Barrett Corp
• Petro River Oil Corp.
• Dorchester Minerals L.P.
• Progress Energy Ltd
• Anderson Energy Ltd
• Enbridge Energy Management L L C
• Atlas America Public #11-2002 Ltd.
• Treasure Island Royalty Trust
• Perpetual Energy Inc.
• Opti Canada Inc
• Sonde Resources Corp.

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