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Author/Creator
- Geological Survey (U.S.)85
- United States. Central Intelligence Agency22
- United States. Central Intelligence Agency. Cartography Center8
- U.S. Census Bureau4
- American Battle Monuments Commission3
- Arkansas Geological Commission3
- Ashley, Roger P. (Roger Parkmand), 1940-3
- Evarts, Russell C.3
- U.S. Census Bureau. Geography Division3
- United States. Bureau of Land Management3
- United States. Department of State. Bureau of Intelligence and Research3
- United States. National Aeronautics and Space Administration3
- Washington (State). Division of Geology and Earth Resources3
- Albuquerque/Bernalillo County Water Utility Authority2
- Arkansas Soil and Water Conservation Commission2
- Clark, Allan K.2
- Counts, H. B. (Harlan B.)2
- Dague, Barbara J.2
- Dartnell, Peter2
- Edwards Aquifer Authority (Tex.)2