by Curtis J. Schmidt, LeAnne E. Hammer, Michael D. Swayne
Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory , for sale by the National Technical Information Service1979Environmental protection technology series
EPA-600/2-79-083
by Norman J. Weinstein ; project officer, Leo T. McCarthy, Jr
National Environmental Research Center, Office of Research and Development, U.S. Environmental Protection Agency , for sale by the Superintendent of Documents, U.S. Government Printing Office1974Environmental protection technology series