1975. Ohio. Division of Geological Survey. Scale 1:12,000. by Stephen P. Reidel.
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1956. Ohio State University. Institute of Geodesy, Photogrammetry and Cartography. Sponsored by the Development Fund, the Graduate School and the Department of Geology. The Anomalies refer to the International Gravity Formula. by ... Ohio. Division of Geological Survey.
1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
1877. Mitchell, S. Augustus (Samuel Augustus), 1792-1868, cartographer. Prime meridian: Washington.; Detached from an atlas, no. 68. Scale approximately 1:1,300,000. S. Augustus Mitchell.
1860. Mitchell, S. Augustus (Samuel Augustus), 1792-1868. Prime meridians: Greenwich, Washington. Imprint from copyright statement. Scale approximately 1:2,281,000. Approximately 1 inch to 38 miles. S. Augustus Mitchell.
1913. Birds's eye view. Title penciled it. Scale drawn in pencil and cannot be distinguished.
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.).