1978. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated in 1976; interpretations derived from soil map constructed 1960.; "Projection and 10,000-metre gr... Dept. of Agriculture, Soil Conservation Service (Washington.).
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2006. National Atlas of the United States. This polygon shapefile contains federally owned or administered lands of the United States, Puerto Rico, and the U.S. Virgin Islands. Only areas of... National Atlas of the United States.
2002. United States. Forest Service and Geological Survey (U.S.). This raster layer portrays general forest cover types for the United States in GeoTIFF format. Data were derived from Advanced Very High Resolution... National Atlas of the United States.
1991. Hull, Dennis N. 1948-. Dennis N. Hull, chief compiler. Ohio. Division of Geological Survey.
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.
1965. Pfannehecker, D. Includes color cross section. D. Pfannehecker. Scale 1:2,250,000. 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.
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.