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Author/Creator
- Geological Survey (U.S.)15
- United States. Environmental Protection Agency3
- National Water-Quality Assessment Program (U.S.)2
- Arkansas Soil and Water Conservation Commission1
- Barbaro, Jeffrey R. (Jeffrey Ralph), 1960-1
- Capesius, Joseph P.1
- Carlson, Carl S.1
- Cinotto, Peter J.1
- Clark, Brian R.1
- Clarke, J. S. (John Stuart)1
- Cobb, R. P.1
- Colorado. Department of Public Health and Environment1
- Crawford, Charles G. (Charles Gene)1
- Delaware Geological Survey1
- Delaware. Department of Natural Resources and Environmental Control1
- Dover Air Force Base (Del.)1
- Flood Control District of Maricopa County1
- Flynn, Robert H.1
- Georgia Geologic Survey1
- Georgia. Environmental Protection Division1