1993. Goldthwait, Richard P. 1911-1992. Includes legend, text, location maps and primary data source maps. compiled by Richard P. Goldthwait and Robert G. Van Horn. Scale 1:250,000 Depths... Ohio. Division of Geological Survey.
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1986. Struble, Richard A. Includes text, 3 tables, location map, and water-well logs. Relief shown by contour lines and spot heights. by Richard A. Struble ; cartographic dr... Ohio. Division of Geological Survey.
2003. Ohio. Division of Geological Survey. Relief shown by shading and gradient tints. Map of geologic regions, with text, on verso. Scale 1:2,000,000. Ohio. Division of Geological Survey.
1975. Guy, Donald E. Description based on 52. Includes both texts and maps. Ohio Division of Geological Survey. Ohio. Division of Geological Survey.
1975. Guy, Donald E. Description based on 52. Includes both texts and maps. Ohio Division of Geological Survey. Ohio. Division of Geological Survey.
1975. Guy, Donald E. Description based on 52. Includes both texts and maps. Ohio Division of Geological Survey. Ohio. Division of Geological Survey.
1975. Guy, Donald E. Description based on 52. Includes both texts and maps. Ohio Division of Geological Survey. Ohio. Division of Geological Survey.
1975. Guy, Donald E. Description based on 52. Ohio Division of Geological Survey. Includes both texts and maps. Ohio. Division of Geological Survey.
1975. Guy, Donald E. Includes both texts and maps. Description based on 52. Ohio Division of Geological Survey. Ohio. Division of Geological Survey.
280. State of Ohio
1910. United States. General Land Office. Relief shown by shading.; At head of title: Department of the Interior, General Land Office, Fred Dennett, Commissioner.; Lower left corner: Compil... (Washington, D.C.], ).