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Author/Creator
- Geological Survey (U.S.)189
- Feltis, R. D. (Richard D.), 1930-18
- New York (State). Department of Environmental Conservation13
- Mack, Frederick K.12
- Maryland Geological Survey12
- Pettijohn, Robert A.11
- Busby, John F.10
- Arkansas Soil and Water Conservation Commission9
- Mississippi. Office of Land and Water Resources9
- National Regional Aquifer Systems Analysis Program (U.S.)9
- United States. Environmental Protection Agency9
- Arkansas Geological Commission8
- Mississippi. Bureau of Land and Water Resources7
- New Jersey. Department of Environmental Protection7
- Smoot, Charles W.7
- Goldsmith, Gala D. S.6
- Louisiana. Department of Transportation and Development6
- Miller, Todd S.6
- Bugliosi, Edward F.5
- Burt, David E., 1960-5