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.", Imprint: Beech Grove, Ind.: Indiana Waters Association, [196?], Scale: Scale not given.; Dimensions: 27 x 17 cm, Coordinates: W0880500 W0844700 N0414500 N0374600
Indiana Waters Association (n.d.). Hoosiers and the waters of Indiana. Indiana Waters Association. https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00092 (map)