by PEI Associates, Inc. for Air and Energy Engineering Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency and Center for Environmental Research Information, Office of Research and Development, U.S. Environmental Protection Agency
U.S. Environmental Protection Agency Office of Research and Development, Center for Environmental Research Information, Robert S. Kerr Environmental Research Laboratory
prepared by Office of Water Programs, College of Engineering and Computer Science, California State University, Sacramento, in cooperation with the California Water Environment Association ; Kenneth D. Kerri [and others]
prepared by Office of Water Programs College of Engineering and Computer Science California State University, Sacramento in cooperation with the National Environmental Training Association for the California Department of Health Services, Sanitary Engineering Branch and U.S. Environmental Protection Agency, Office of Drinking Water ; Kenneth D. Kerri, project director