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Author/Creator
- Geological Survey (U.S.)22
- Mack, Frederick K.6
- Maryland Geological Survey6
- Maryland Power Plant Research Program5
- New York (State). Department of Environmental Conservation5
- Andreasen, David C.4
- Brockman, Allen R. (Allen Richard), 1961-4
- Curtin, Stephen E.4
- Lyke, William L.4
- North Carolina. Department of Natural Resources and Community Development4
- Winner, M. D., Jr.4
- Bugliosi, Edward F.3
- Trudell, Ruth A.3
- Wheeler, J. Craig3
- Casey, George D.2
- Ackerman, D. J.1
- Barr, G. L.1
- Breen, Kevin J.1
- Bush, Peter W.1
- Clarke, J. S. (John Stuart)1