Blue line print. "Base modified from Indiana Department of Conservation, Geological Survey, Base map of portion of western Indiana, 1951." Includes "Outline map of Indiana showing location of map area", "Township diagram", and index of "Active coal mines in Indiana (as of February 1, 1975)." Imprint: [Bloomington, Ind.] : Indiana Dept. of Conservation, Geological Survey, [1975] Scale: 1:325,000; Dimensions: 88 x 54 cm Coordinates: W0872723 W0862628 N0403749 N0374618