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- Geological Survey (U.S.), issuing body20
- Geological Survey (U.S.)8
- National Water-Quality Assessment Program (U.S.)6
- United States. Environmental Protection Agency6
- United States. Environmental Protection Agency. Office of Water4
- Eikenberry, Barbara C. Scudder3
- Eisler, Ronald, 1932-3
- Great Lakes Restoration Initiative (U.S.)3
- U.S. Fish and Wildlife Service3
- Adams, Ryan F.2
- Altman, Bob2
- American Chemical Society. Division of Environmental Chemistry, sponsoring body2
- Crawford, J. Kent2
- Del Giorgio, Paul A., 1961-2
- Embrey, S. S.2
- Environmental Research Laboratory (Duluth, Minn.)2
- Henson, Colleen M.2
- Inkpen, E. L.2
- Kim, Se-Kwon2
- Koebel, Carolyn M.2