prepared by the North American Lake Management Society for the U.S. Environmental Protection Agency, Office of Water Assessment and Watershed Protection Division, Nonpoint Sources Branch
prepared by the Terrence Institute ; in cooperation with the U.S. Environmental Protection Agency, Office of Water, Office of Wetlands, Oceans, and Watersheds, Assessment and Watershed Protection Division
by W.B. Mills ... [and others] ; produced by JACA Corporation ; prepared in cooperation with U.S. EPA's Center for Water Quality Modeling, Environmental Research Laboratory [and] Monitoring and Data Support Division, Office of Water Regulations and Standards, Office of Water [and] Technology Transfer, Center for Environmental Research Information