• Geodyne Energy Income Ltd Partnership II-B
• Matador Petroleum Corp
• Basin Exploration Inc
• Parker & Parsley 88 a L P
• Parker & Parsley 88 B L P
• Petromet Resources Ltd
• Skye Petroleum
• Enex Oil & Gas Income Program III Series 6 LP
• Enex Income & Retirement Fund Series 3 LP
• Swift Energy Income Partners 1987-C Ltd
• Kcs Energy Inc
• Swift Energy Income Partners 1987-D Ltd
• Geodyne Energy Income Ltd Partnership II-C
• Burlington Resources Inc
• Geodyne Energy Income Ltd Partnership II-D
• Stratford American Corp
• Oryx Energy Co
• Key Production Co Inc
• Devon Energy Corp
• Swift Energy Income Partners 1988-A Ltd
• Swift Energy Managed Pension Assets Partnership 1988-A Ltd
• Mallon Resources Corp
• Parker & Parsley Producing Properties 88-A LP
• North Coast Energy Inc
• Greka Energy Corp
• Swift Energy Income Partners 1988-B Ltd
• Swift Energy Managed Pension Assets Partnership 1988-1 Ltd
• Swift Energy Managed Pension Assets Partnership 1988-B Ltd
• Enex 88 89 Income & Retirement Fund Series 2 L P
• Geodyne Energy Income Ltd Partnership II-E
• American Energy Group Ltd
• Peake Energy Inc
• Woodside Energy Group Limited
• Parker & Parsley 89 a L P
• Parker & Parsley 89 B L P
• Parker & Parsley 90 a L P
• Parker & Parsley 90 B L P
• Parker & Parsley 90 C L P
• Parker & Parsley 89 B Conv LP
• Tetra Technologies Inc.
• Harvest Natural Resources, Inc.
• Chieftain International Inc
• Pioneer Natural Resources USA Inc
• Southwest Oil & Gas Income Fund IX-A LP
• Southwest Royalties Institutional Income Fund IX-B LP
• Eagle Ford Oil & Gas Corp
• Dynamic Oil & Gas Inc
• Swift Energy Income Partners 1988-C Ltd
• Swift Energy Managed Pension Assets Partnership 1988-C Ltd
• Enex 88 89 Income & Retirement Fund Series 3 L P

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