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Author/Creator
- Geological Survey (U.S.)89
- Busby, John F.10
- Mack, Frederick K.10
- Maryland Geological Survey10
- Pettijohn, Robert A.10
- Mississippi. Office of Land and Water Resources9
- National Regional Aquifer Systems Analysis Program (U.S.)8
- United States. Environmental Protection Agency7
- Arkansas Geological Commission6
- Goldsmith, Gala D. S.6
- Arkansas Soil and Water Conservation Commission5
- Brahana, J. V.5
- Burt, David E., 1960-5
- Mississippi. Bureau of Land and Water Resources5
- New York (State). Department of Environmental Conservation5
- Oakley, W. T. (William Thomas), 1942-5
- Andreasen, David C.4
- Beckman, Jeffery D.4
- Bradley, Michael W.4
- Brockman, Allen R. (Allen Richard), 1961-4