. . . . "Oil and gas activities on national wildlife refuges"@en . "United States Fish and Wildlife Service"@en . . . "Opportunities remain to improve oversight and management of oil and gas activities on national wildlife refuges"@en . . . . "U.S. Fish and Wildlife Service : opportunities remain to improve oversight and management of oil and gas activities on national wildlife refuges"@en . . . . "U.S. Fish and Wildlife Service opportunities remain to improve oversight and management of oil and gas activities on national wildlife refuges"@en . . . . . . .