Shows Corps of Engineers district boundaries drawn on a drainage map of Indiana and includes population density for each district.; 1 1/2 million Hoosiers (1/3 of the population of Indiana) live in the Chicago and Detroit Dist. Corps areas.; Includes a list of the officers and directors of the Indiana Waters Association. Scale not given.JPEG9692755c-df9b-4a8d-9c6b-0a25b517319fengIndiana Waters AssociationPublicHoosiers and the waters of IndianaMapsIndianaapproximately 1960Indiana University