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Author/Creator
- Geological Survey (U.S.)9
- Carter, Janet M.5
- Redden, Jack A. (Jack Allison), 1926-20195
- South Dakota. Department of Environment and Natural Resources5
- West Dakota Water Development District (S.D.)5
- United States. Central Intelligence Agency4
- Long, John Hamilton2
- U.S. Fish and Wildlife Service2
- Brown, Timothy A.1
- Chezar, Henry1
- Christensen, Harriet H.1
- Davis, J. Hal1
- DenBoer, Gordon, 1933-1
- Dunning, C. P.1
- George Philip & Son1
- Instituto Geográfico Nacional (Spain)1
- Maps.com (Firm)1
- Mendes, Cândido, 1818-18811
- Mokray, Michael F.1
- Oxford University Press1