1959. Walker, Alfred C. Map side also contains legend and explanation of map symbols. Scale bar lower left corner. Text includes information about generalized stratigraphi... Ohio. Division of Water.
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1838. Detached from U.S. 24th Cong., 3rd Sess., 1838-1839, S. Doc. No. 49. 'The red shaded lines show the exterior six miles limits on each side of strai... United States Congress.
1974. Hutchison, Harold C. (Harold Christy), 1925-. Blue line print. 'Base modified from Indiana Department of Conservation, Geological Survey. Base map of portion of western Indiana, 1951.' Includes... Indiana Department of Geology and Natural Resources.
1979. Eggert, Donald L., cartographer. December 1979. Scale approximately 1:380,000. Indiana Geological Survey.
2000. Eaton, Nathan (Cartographer) and Weber, Licia. Compilation complete through October 1997.' 'Base map digitized from 1:500,000 scale, 1978 U.S. Geological Survey map of Indiana.' Includes text an... Indiana Geological Survey.
1959. Walker, Alfred C. Map side also contains legend and explanation of map symbols. Text includes information about generalized stratigraphic sequence of the rocks in th... Ohio. Division of Water.
1959. Walker, Alfred C. Prepared by ALFRED C. WALKER, Geologist, Ohio Division of Water, from data compiled by Lawrence R. Brunstetter. Scale bar lower right corner of map... Ohio. Division of Water.
1927. Shows an area from Chicago on the west to Upper Sandusky, Ohio on the east, and Coldwater, Michigan on the north to New Castle, Indiana on the sout... Poor's Pub. Co.
1960. Pree, Henry L. (Henry Louis), 1917-. Prepared by HENRY L. PREE, JR. Geologist, Ohio Division of Water Map side also contains legend and explanation of map symbols. Text includes inform... Ohio. Division of Water.
1962. Pree, Henry L. (Henry Louis), 1917-. Scale bar lower left corner of map. Text includes information about generalized stratigraphic sequence of the rocks in the Black and Clear Fork Bas... Ohio. Division of Water.