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Author/Creator
- Environmental Monitoring Systems Laboratory (Las Vegas, Nev.)3
- Heck, Walter Webb, 1926-3
- United States. Agricultural Research Service3
- United States. Environmental Protection Agency. Environmental Monitoring and Assessment Program3
- Bay, Jeff2
- Campbell, C. L. (C. Lee)2
- United States. Environmental Protection Agency2
- Olson, Richard K.1
- United States. Environmental Protection Agency. Office of Research and Development1
- United States. Soil Conservation Service. Conservation Planning Division1