1987. Risser, Michele. Includes references. Scale 1:63,360 by Michele L. Risser ; cartographic drafting by Robert L. Stewart. Includes text, 2 tables, and location map. R... Ohio. Division of Geological Survey.
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1987. Hull, Dennis N. "Contour interval is 10 feet." by Dennis N. Hull. Includes text, bibliography, index and location map. Scale approximately 1:63,360 Relief shown by... Ohio. Division of Geological Survey.
1977. Bower, C. W. Date 2-10-66.' Indexed for points of interest. Scale not given. Dwg. by C.W. Bower; courtesy of Indiana & Michigan Electric Co.