submitted by the U.S. Department of Transportation, Federal Highway Administration, Minnesota Department of Transportation and Wisconsin Department of Transportation
Minnesota, Dept. of Conservation, Division of Waters, Soils & Minerals [and] Wisconsin Dept. of Natural Resources, Division of Environmental Protection, in cooperation with U.S. Army Corps of Engineers, St. Paul District [and] U.S. Geological Survey
Conference in the Matter of Progress Meeting of the Conference Concerning Pollution of the Interstate and Intrastate Waters of the Upper Mississippi River and Its Tributaries - Minnesota and Wisconsin (2nd : 1969 : Minneapolis, Minn.)