1991. Walker, Alfred C. Scale approximately 1:63,000. by Alfred C. Walker ; Xiaoning Jiang, cartographer.
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1986. Walker, Alfred C. by Alfred C. Walker ; cartography, David S. Orr. "Total copies printed: 500." Scale 1:62,500 Relief shown by contours and spot heights. Includes lo... Ohio. Department of Natural Resources.
1986. Walker, Alfred C. "Total copies printed: 500." by Alfred C. Walker ; cartography, by David S. Orr. Scale 1:62,500 Relief shown by contours and spot heights. Includes... Ohio. Department of Natural Resources.
1991. Walker, Alfred C. "2/91." "Total copies printed: 500." Scale approximately 1:62,500 Relief shown by contours and spot heights. by Alfred C. Walker ; Xiaoning Jiang, ... Ohio. Department of Natural Resources.
1986. Walker, Alfred C. by Alfred C. Walker ; cartography, David S. Orr. Includes location map. Scale 1:62,500 Relief shown by contours and spot heights. "Total copies pri... Ohio. Department of Natural Resources.
1985. Walker, Alfred C. Includes location map. by Alfred C. Walker. Relief shown by contours and spot heights. Scale 1:135,000. Ohio. Department of Natural Resources.
7. Map of a part of the lower portion Tuscarawas River Basin showing availability of underground water
1962. Walker, Alfred C. Scale bar lower left corner of map. "Prepared by ALFRED C. WALKER, Geologist, Ohio Division of Water" Map side also contains legend and explanation... Ohio. Division of Water.
8. Map of a part of the middle portion Muskingum River Basin showing availability of underground water
1962. 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.
9. Map of a part of the middle portion of Miami River Basin showing availability of underground water
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.
1960. Walker, Alfred C. Prepared by ALFRED C. WALKER, Geologist, Ohio Division of Water Text includes information about generalized stratigraphic sequence of the rocks in ... Ohio. Division of Water.
11. Map of a portion of the Lower Little Miami River Basin showing availability of underground water
1960. Walker, Alfred C. Scale bar lower left corner of map. "Prepared by ALFRED C. WALKER, Geologist, Ohio Division of Water" Map side also contains legend and explanation... Ohio. Division of Water.
1960. Walker, Alfred C. Text includes information about generalized stratigraphic sequence of the rocks in the Loramie and Mosquito Creek Area and quality of underground w... Ohio. Division of Water.
1959. Walker, Alfred C. Text includes information about generalized stratigraphic sequence of the rocks in the Blanchard Basin and quality of underground water. Map side a... Ohio. Division of Water.
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. 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 left corner. Text i... Ohio. Division of Water.
1959. Walker, Alfred C. Map side also contains legend and explanation of map symbols. Scale bar lower right corner. "Prepared by ALFRED C. WALKER, Geologist, Ohio Division... 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. Map side also contains legend and e... Ohio. Division of Water.
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.
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.
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