United States Department of the Interior, Geological Survey in collaboration with Canada Department of Mines and Resources, Dominion Water and Power Bureau
by D.F. Farrell [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
prepared under the direction of C.G. Paulsen, Chief Hydraulic Engineer ; prepared in cooperation with the states of Arkansas, Louisiana, Oklahoma, and Texas, and other agencies