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Author/Creator
- National Pollutant Discharge Elimination System (U.S.)1
- Potter, W. D. (William Dayton), 1898-1
- Rossman, Lewis A.1
- United States. Environmental Protection Agency. Office of Research and Development1
- United States. Environmental Protection Agency. Office of Wastewater Enforcement and Compliance. Permits Division1
- United States. Environmental Protection Agency. Office of Wastewater Management1
- United States. Environmental Protection Agency. Office of Water1
- United States. Soil Conservation Service1