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Yale Oil Association, Inc.
in Oil & Gas Exploration & Production
6 NE 63rd St., Suite 425
Oklahoma City, Oklahoma
73105
United States
RKI Exploration & Production
in Oil & Gas Exploration & Production
210 Park Ave., Suite 900
Oklahoma City, Oklahoma
73102
United States
Vanguard Development Company
11600 Broadway Extension, Suite 250
Oklahoma City, Oklahoma
73114-6600
United States