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1976
Samuelson, Donald F., and U.S. Environmental Protection Agency. Office of Research and Development. Water quality : Western Fish Toxicology Station and western Oregon rivers In Ecological Research Series ; EPA-600/3-76-077. Duluth, Minnesota: Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory, 1976.
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1956
Westgarth, Warren C., Martin Northcraft, and Oregon State College. Engineering Experiment Station. Water Quality Data Inventory In Oregon State Water Resources Board bulletin. Vol. no.1. [Salem, Or.]: Oregon State Water Resources Board, 1956.