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Author/Creator
- Geological Survey (U.S.)91
- South Dakota Geological Survey9
- Shade, Patricia J.5
- Wyoming. State Engineer's Office5
- Pacific Islands (Trust Territory)4
- Plafcan, Maria4
- Puerto Rico. Department of Agriculture4
- Van der Brug, Otto4
- Hamilton, Louis J. (Louis John)3
- National Water-Quality Assessment Program (U.S.)3
- Barber, Nancy L.2
- Batten, W. G.2
- Díaz, José Raúl2
- Douglas County (Or.)2
- East Dakota Water Development District (S.D.)2
- Garrabrant, Lynn A.2
- Hansen, Donald S.2
- Howells, Lewis W.2
- Kingsbury, James A.2
- Kume, Jack2