Corvallis, Or. : Springfield, Va. :; Corvallis, Oregon : U.S. Environemtnal Protection Agency, Office of Research and Development, Corvallis Environmental Research Laboratory, Criteria and Assessment Branch ; For sale by the National Technical Information Service,; U.S. Environmental Protection Agency, Office of Research and Development, Corvallis Environmental Research Laboratory, Criteria and Assessment Branch, 1976

Corvallis, Or. : Springfield, Va. : U.S. Environmental Protection Agency, Office of Research and Development, Corvallis Environmental Research Laboratory, Criteria and Assessment Branch ; For sale by the National Technical Information Service, 1976

Washington : Office of Research and Development, U.S. Environmental Protection Agency; for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1974