1960. Walker, Alfred C. Prepared by ALFRED C. WALKER, Geologist, Ohio Division of Water Map side also contains legend and explanation of map symbols. Scale bar lower right... Ohio. Division of Water.
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1960. Pree, Henry L. (Henry Louis), 1917-. Text includes information about generalized stratigraphic sequence of the rocks in the lower portion of the Grand River Basin and the quality of un... Ohio. Division of Water.
1958. Walker, Alfred C. Prepared by ALFRED C. WALKER, Geologist, Ohio Division of Water Map side also contains legend and explanation of map symbols. Text includes informa... Ohio. Division of Water.
1960. Cummins, James W. 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.
1962. Stein, Russell B. Text includes information about generalized stratigraphic sequence of rocks in the Lower portion of the Sandusky River Basin and the quality of und... Ohio. Division of Water.
1962. Pree, Henry L. (Henry Louis), 1917-. Map side also contains legend and explanation of map symbols. "Prepared by HENRY L. PREE, JR., Geologist, Ohio Division of Water" Text includes inf... Ohio. Division of Water.
1962. Walker, Alfred C. Text includes information about generalized stratigraphic sequence of the rocks in the Lower Wills Creek Basin and quality of underground water. Sc... Ohio. Division of Water.
1959. Schmidt, James J. Scale bar lower left corner of map. Map side also contains legend and explanation of map symbols. Text includes information about generalized strat... Ohio. Division of Water.
1958. Walker, Alfred C. Prepared by ALFRED C. WALKER, Geologist, Ohio Division of Water Map side also contains legend and explanation of map symbols. Text includes informa... Ohio. Division of Water.
150. Map of the middle portion of the Mahoning River Basin showing availability of underground water
1960. Cummins, James W. Scale bar lower left corner of map. Text includes information about generalized stratigraphic sequence of the rocks in the middle Mahoning River Ba... Ohio. Division of Water.