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Author/Creator
- Geological Survey (U.S.)54
- United States. Environmental Protection Agency5
- Chester County Water Resources Authority4
- Dumouchelle, D. H. (Denise H.)4
- Commonwealth Utilities Corporation (Northern Mariana Islands)3
- Gingerich, Stephen B.3
- Miller, Todd S.3
- New York (State). Department of Environmental Conservation3
- Ackerman, D. J.2
- Black Hills Conservancy Sub-District (S.D. and Wyo.)2
- Carruth, R. L.2
- Garges, John A.2
- Lane, R. C. (Ronald C.), 1946-2
- Mills, K. R. (Kathy R.)2
- Northern Mariana Islands2
- Peter, Kathy D.2
- Robson, Stanley G.2
- Smoot, Charles W.2
- South Dakota. Department of Water and Natural Resources2
- U.S. Army Kwajalein Atoll2