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- Virginia. Dept. of Environmental Quality✖[remove]22
- Geological Survey (U.S.)20
- McFarland, E. Randolph6
- Moyer, Douglas L.3
- Sprague, Lori A.3
- Bruce, T. Scott, 1960-2
- Chesapeake Bay Program (U.S.)2
- Gohn, Gregory S.2
- Hampton Roads Planning District Commission (Va.)2
- Horton, J. Wright2
- Hyer, Kenneth E. (Kenneth Edward)2
- Langland, Michael J.2
- Langley Research Center2
- Maryland. Dept. of Natural Resources2
- Powars, David S.2
- United States. Environmental Protection Agency2
- Wiegand, Ute2
- Alvarez, David1
- Austin, Samuel H.1
- Eggleston, Jack R. (Jack Randolph), 1967-1