Estados Unidos. Environmental Protection Agency. Office of Water Regulations and Standards. Criteria & Standards Division (Autor/Nombre Corporativo)

Modeling phosphorus loading ... 1980 (a.e.) cover (United States Environmental Protection Agency Office of Water Regulations and Standards, Criteria & Standards Division, Wash., D.C.)

Phone call to the Division, 2/9/81 (There are several different Criteria & Standards Divisions under different offices of the Environmental Protection Agency; United States Environmental Protection Agency, Office of Water Planning and Standards, became the United States Environmental Protection Agency, Office of Water Regulations and Standards, 5/2/80)

Ambient water quality criteria for chromium, 1980: t.p. (U.S. Environmental Protection and Agency, Office of Water Regulations and Standards, Criteria and Standards Division)