1980. Geological Survey (U.S.). This polygon shapefile contains the 1980 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).
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1980. Scale approximately 1:2,000,000. "Adapted from glacial map of Ohio, U.S. Geological Survey Miscellaneous geologic investigations, Map I-316." Title...
1980. Crowell, Katie. Includes location map. by Katie Crowell ; cartography, Craig A. Schottenstein. Scale approximately 1:63,000. Relief shown by contours and spot heig... Ohio. Division of Water.
1980. Schmidt, James J. Includes location map. Relief shown by contours and spot heights. by James J. Schmidt ; cartography, VK. Scale approximately 1:63,000. Ohio. Division of Water.
1980. Struble, Richard A. Title assigned by cataloguer. prepared ... by Richard A. Struble and David A. Hodges. "Areal density of photo linears occurring within a 5000 meter... Ohio. Division of Geological Survey.
1980. Struble, Richard A. Base map: USGS Cleveland, Ohio; Pa., U.S., Ont., Can. (4th ed. 1972 rev.) "Areal density of photo linears occurring within a 5000 meter square grid... Ohio. Division of Geological Survey.
1980. Struble, Richard A. Base map: USGS Cleveland, Ohio; Pa., U.S., Ont., Can. (4th ed. 1972 rev.) "Areal density of photo linears occurring within a 5000 meter square grid... Ohio. Division of Geological Survey.
1980. Struble, Richard A. Base map: USGS Cleveland, Ohio; Pa., U.S., Ont., Can. (4th ed. 1972 rev.) "Areal density of photo linears occurring within a 5000 meter square grid... Ohio. Division of Geological Survey.
1980. Struble, Richard A. Title assigned by cataloguer. prepared ... by Richard A. Struble and David A. Hodges. "Areal density of photo linears occurring within a 5000 meter... Ohio. Division of Geological Survey.
1980. Struble, Richard A. Base map: USGS Cleveland, Ohio; Pa., U.S., Ont., Can. (4th ed. 1972 rev.) "Areal density of photo linears occurring within a 5000 meter square grid... Ohio. Division of Geological Survey.
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