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Author/Creator
- Geological Survey (U.S.)29
- Chester County Water Resources Authority4
- McManus, B. Craig4
- Stricker, Virginia3
- Kingsbury, James A.2
- Memphis (Tenn.). Light, Gas, and Water Division2
- New Hope (Pa.)2
- New York (State). Department of Environmental Conservation2
- Smoot, Charles W.2
- U.S. Fish and Wildlife Service2
- United States. Environmental Protection Agency2
- Arkansas Geological Commission1
- Arkansas Soil and Water Conservation Commission1
- Arnold Air Force Base (Tenn.)1
- Aucott, Walter R.1
- Bassick, M. D.1
- Brown, Timothy A.1
- Bugliosi, Edward F.1
- Crist, Marvin A., 1930-1
- Davis, J. Hal1