Geological Survey (U.S.)Minnesota. State Drainage Commission.Cartographic Details: Scales vary. Adolph O. Eberhart, Samuel G. Iverson, Julius A. Schmidt, State Drainage Commission; George A. Ralph, chief engineer; Robert Follansbee, district engineer, U.S. Geological Survey.45 x 51 centimeters or largerJPEGUMN_ALMA:9939553080001701engU.S. Geological Survey (Washington, D.C.)PublicRiver surveys : [maps and profiles to accompany report of the water resources investigation of Minnesota, 1909-1912], Volume 1MapsMinnesota1909University of Minnesota