1909. Bownocker, J. A. 1865-1928. Scale [1:506,880]. Eight miles to one in. Geologic formations shown by colors and symbols. "Based on preceding maps by Newberry and Orton." "A. Hoe... Geological Survey of Ohio.
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1994. Baranoski, Mark T. compiled by M.T. Baranoski and L.H. Wickstrom. Scale approximately 1:400,000. OSU's copy 1 "Key to references cited on map of Basement Structures i... Ohio. Division of Geological Survey.
1974. Osborne, Robert H. Scale: 1: 24,000. by Robert H. Osborne. Includes marginal and bibliographical references. Ohio. Division of Geological Survey.
1974. Ford, John Philip. Scale: 1:24,000. by John P. Ford. Ohio. Division of Geological Survey.
1972. DeLong, Richard M. by Richard M. DeLong. Scale 1:24,000.
1975. Ohio. Division of Geological Survey. Scale 1:12,000. by Stephen P. Reidel.
1991. Hull, Dennis N. 1948-. Dennis N. Hull, chief compiler. Ohio. Division of Geological Survey.
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.
1965. Pfannehecker, D. Includes color cross section. D. Pfannehecker. Scale 1:2,250,000. Ohio. Division of Geological Survey.
1958. Sturgeon, Myron Thomas, 1908-. geology by Myron T. Sturgeon and Associates ; geologic map compiled by Gilbert E. Smith and others ; drafting by Harold J. Flint. Scale 1:625,000. ... Ohio. Division of Geological Survey.
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