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Author/Creator
- Geological Survey (U.S.)531
- United States. Environmental Protection Agency26
- United States. Department of Energy20
- Sloto, Ronald A.12
- Alabama. Department of Environmental Management11
- National Water-Quality Assessment Program (U.S.)11
- New Jersey. Department of Environmental Protection11
- New Hampshire. Water Resources Division10
- Nassau County (N.Y.). Department of Public Works9
- Southwest Florida Water Management District (Fla.)9
- United States. Bureau of Land Management9
- United States. Department of Energy. Nevada Operations Office9
- United States. National Park Service9
- South Florida Water Management District (Fla.)8
- Minnesota. Department of Natural Resources7
- New Mexico. State Engineer Office7
- St. Johns River Water Management District (Fla.)7
- Carruth, R. L.6
- Dickerman, David C.6
- Kay, Robert T.6