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