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Author/Creator
- Geological Survey (U.S.)140
- National Water-Quality Assessment Program (U.S.)6
- United States. Bureau of Reclamation6
- United States. National Park Service6
- Inman, Ernest J.5
- United States. Army. Corps of Engineers5
- United States. Environmental Protection Agency5
- Lumia, Richard4
- Arizona. Department of Water Resources3
- Arkansas Soil and Water Conservation Commission3
- Clifford, Scott3
- DeKalb County (Ga.)3
- Georgia. Department of Transportation3
- Lyford, Forest P.3
- New York (State). Department of Transportation3
- Sanders, C. L. (Curtis L.)3
- Torres-Sierra, Heriberto3
- United States. Department of Energy3
- United States. Federal Emergency Management Agency3
- United States. Federal Highway Administration3