United States -- Federal Aviation Administration -- Mike Monroney Aeronautical Center. ( Oklahoma City, Oklahoma United States) [CyberTools for Libraries] +
United States -- National Oceanic and Atmospheric Administration. ( Norman, Oklahoma United States) [Athena]
United States -- National Park Service. ( Sulphur, Oklahoma United States) [EOS.Web]
United States -- National Park Service. ( Oklahoma City, Oklahoma United States) [EOS.Web]
United States -- National Park Service. ( Cheyenne, Oklahoma United States) [EOS.Web]