1980. United States. Soil Conservation Service. Base compiled from USGS 1:24 000-scale topographic maps dated 1968-1975, map edited 1978, revised from aerial photographs taken 1975; interpretatio... Dept. of Agriculture, Soil Conservation Service (Washington.).
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1980. Projection: WGS72 Mercator Projection; Series: Defense Mapping Agency Nautical Charts. National Geospatial-Intelligence Agency.
1980. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated 1978; interpretations derived from soil map constructed 1972.; "Projection and 10,000-metre grid ... Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1967."; May 1980.; Includes location map. 46 x 44 centimeters 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1953."; May 1980.; Includes location map. 54 x 63 centimeters 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1979."; May 1980.; Includes location map. 51 x 50 centimeters 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base dated 1979; interpretations derived from soil map constructed 1979.; "Projection and 10,000-metre grid tick... Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. "Interpretations derived from soil survey published in 1976."; "May 1980. 5,R-37,826."; Includes location map. 79 x 73 centimeters 1:50,000. U.S. Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated 1979; interpretations derived from soil map constructed 1975.; "March 1980. 5,R-37,751."; Include... U.S. Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated 1979; interpretations derived from soil survey published in 1974.; "August 1980; 5,R-38,057."; In... U.S. Dept. of Agriculture, Soil Conservation Service (Washington.).