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- Geological Survey (U.S.)✖[remove]1,915
- Geological Survey of Alabama89
- Scott, John C., 1926-21
- Alabama. Dept. of Environmental Management13
- Newton, John G., 1929-13
- Causey, Lawson V., 1917-10
- Hedgecock, T. S.10
- Alabama. Dept. of Transportation9
- Atkins, J. B.8
- DeJarnette, Sydney S.8
- Gannett, Henry, 1846-19147
- National Water-Quality Assessment Program (U.S.)7
- Nell, Louis7
- Planert, Michael7
- Lines, Gregory C.6
- Moreland, Richard S.6
- Robinson, James L.6
- Williams, John S. (John Sutherland), 1947-6
- Alabama. Office of Water Resources5
- Harris, Wiley F.5