by Robert L. Melvin ... [and others] ; [manuscript preparation and editing by, Jennifer A. VanLoon] ; prepared in cooperation with the U.S. Environmental Protection Agency
by Richard Bridge Moore ... [and others] ; in cooperation with the New England Interstate Water Pollution Control Commission and U.S. Environmental Protection Agency
by Bradford Butman ... [and others] ; prepared in cooperation with the U.S. Environmental Protection Agency under cooperative agreement CX-813547-01-0 with the Woods Hole Oceanographic Institution
by Robert L. Houghton ... [and others] ; prepared in cooperation with the U.S. Bureau of Land Management, the U.S. Environmental Protection Agency, and the North Dakota Geological Survey