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
developed by the Center for Environmental Research Information, Office of Research and Development, U.S. Environmental Protection Agency ; [prepared for the U.S. Environmental Protection Agency by the JACA Corporation, and Battelle, Pacific Northwest Laboratories]
prepared jointly by Effluent Guidelines Division, Office of Water Planning and Standards, Office of Water and Waste Management and Center for Environmental Research Information, Office of Research Program Management, Office of Research and Development