• Allen Energy Co
• Sterling Drilling Fund 1983-2
• Dyco Oil & Gas Program 1984-1
• Dyco Oil & Gas Program 1984-2
• May Limited Partnership 1983-1
• Abf Capital Corp
• Emi Inc
• May Limited Partnership 1983-2
• May Drilling Partnership 1984-1
• May Drilling Partnership 1984-2
• May Drilling Partnership 1984-3
• May Limited Partnership 1983-3
• Parker & Parsley 83-A Ltd
• Parker & Parsley 83-B Ltd
• Dyco Oil & Gas Program 1985-1 Limited Partnership
• Dyco Oil & Gas Program 1985-2 Limited Partnership
• Tmbr Sharp Drilling Inc
• May Limited Partnership 1984-2
• May Limited Partnership 1984-1
• Parker & Parsley 84-A Ltd
• Enex Oil & Gas Income Program II-2 LP
• May Limited Partnership 1984-3
• Noble Drilling Corp
• Vineyard Oil & Gas Co
• Dyco Oil & Gas Program 1986-2
• Enex Oil & Gas Income Program II 7 L P
• Coastal 1986 Drilling Program Ltd
• Enex Oil & Gas Income Program II-8 L P
• Parker & Parsley 85-A Ltd
• Parker & Parsley 85-B Ltd
• Frontier Energy Corp.
• Nabors Industries Inc
• Dyco Oil & Gas Program 1986-X
• Dyco Oil & Gas Program 1978-2 Limited Partnership
• Dyco Oil & Gas Program 1979-1 Limited Partnership
• Dyco Oil & Gas Program 1979-2 Limited Partnership
• Dyco Oil & Gas Program 1980-1 Limited Partnership
• Dyco Oil & Gas Program 1980-2 Limited Partnership
• Enex Oil & Gas Income Program III Series 1 L P
• Norton Drilling Services Inc
• Parker & Parsley 87-A Ltd
• Parker & Parsley 87-B Ltd
• Enex Oil & Gas Income Program III Series 2 L P
• Coastal 1987 Drilling Program Ltd
• Hygenics Pharmaceuticals Inc
• Enex Oil & Gas Income Program III Series 3 L P
• Alliance Petroleum Corp
• Enex Oil & Gas Income Program III Series 4 L P
• American Noble Gas Inc
• Enex Oil & Gas Income Program III Series 5 LP

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