Doyle, Frank J.
Washington : Office of Research and Development, U.S. Environmental Protection Agency; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1974.
Horstein, Bernard.
Cincinnati,Ohio : National Environmental Research Center : Office of Research and Monitoring : U.S. Environmental Protection Agency, 1972.
Reid, George W. (George Willard), 1917-1987.
Washington : U. S. Environmental Protection Agency, Office of Research and Monitoring, 1972[that is, 1973]