1991. Hull, Dennis N. 1948-. Dennis N. Hull, chief compiler. Ohio. Division of Geological Survey.
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1984. Hull, Dennis N. by Dennis N. Hull ; cartographic drafting by Leonard M. Guckenheimer and Katherine L. Jennings. Includes location map. Includes bibliography. 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.
1948. Lamborn, Raymond E. 1890-. by Raymond E. Lamborn. "Base from topographic maps of U.S. Geological Survey." Relief shown by contours and spot heights. Scale 1:62,500. Ohio. Division of Geological Survey.
1947. White, George W. (George Willard), 1903-1985. "Base from topographic maps of U.S. Geological Survey." by George W. White. Relief shown by contours and spot heights. Scale 1:62,500.
1947. Bownocker, J. A. 1865-1928. "First printing 1920, reprinted 1929. Reprinted 1947 with revision of glacial boundary by G.W. White and with changes in base map." compiled by J.A... Ohio. Division of Geological Survey.
1920. Bownocker, J. A. 1865-1928. J.A. Bownocker, state geologist ; revisions of the geology of Ohio shown on this map are the work of J.A. Bownocker, W.G. Burroughs [etc.] ... W.D.... Geological survey of Ohio.
1948. Flint, Norman K. 1921-. Scale 1:62,500 "Base from U.S. Geological Survey topographic maps." Relief shown by contours and spot heights. by Norman K. Flint ; Geological Surv... Ohio. Division of Geological Survey.