"Base from Map of Indiana, 1950 edition, published by U.S. Geological Survey. Minor revisions made from Indiana Dept. of Conservation, Geological Survey, county base maps." "Atlas of Mineral Resources of Indiana, Map No. 6." Appears in Appears in Atlas of mineral resources of Indiana / Indiana Geological Survey. [Bloomington, Indiana] : Indiana Department of Conservation, Geological Survey, [1953?].
Imprint: [Bloomington, In.:] Indiana Department of Conservation, Geological Survey, 1953.
Dimensions: 46 x 31 cm