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- SpringerLink (Online service)122
- Geological Survey (U.S.)39
- Geological Survey (U.S.), issuing body16
- National Water-Quality Assessment Program (U.S.)9
- ebrary, Inc9
- Weller, Milton Webster7
- Cole, Gerald A., 1917-6
- Moss, Brian6
- U.S. Fish and Wildlife Service6
- Cuffney, Thomas F., 1952-5
- Deacon, Jeffrey R.4
- Moss, Brian, 1943-4
- Project Muse4
- United States. Bureau of Reclamation4
- Arthington, Angela H., 1943-3
- Battarbee, R. W.3
- Bradfield, Arthur D.3
- Clifton, Daphne G.3
- Kernan, M. R.3
- Likens, Gene E., 1935-3