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
by G.F. Lindholm ... [and others] ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the Minnesota Department of Natural Resources, Division of Waters, Soils, and Minerals
by J.O. Helgesen ... [and others] ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the Minnesota Department of Natural Resources, Division of Waters, Soils, and Minerals