2001. "Publication date: 11/2001." Cross section color-coded for geologic time period represented within the geologic layers. Includes notes, color cross... Ohio. Department of Natural Resources.
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1986. Schmidt, James J. Relief shown by contours and spot heights. by James J. Schmidt ; cartography, David S. Orr. Scale 1:62,500 "Total copies printed: 500." Includes lo... Ohio. Department of Natural Resources.
1985. Schmidt, James J. by James J. Schmidt. Relief shown by contours and spot heights. Scale 1:62,500 Includes location map. "Total copies printed: 500.". Ohio. Department of Natural Resources.
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.
1983. Schmidt, James J. Includes location map. by James J. Schmidt, 1982 ; cartography, Douglas E. Keen. Scale 1:62,500 Relief shown by contours and spot heights. Ohio. Department of Natural Resources.
1986. Hartzell, Glenn W. Includes location map. Scale 1:62,500 Relief shown by contours and spot heights. by Glen W. Hartzell ; cartography, David S. Orr. 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.