1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1978."; May 1980.; Includes location map. 49 x 45 centimeters Scale 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
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1979. United States. Soil Conservation Service. Base compiled in 1976 from USGS 1:24,000-scale topographic maps dated 1954-1974, revised from aerial photographs taken 1976; interpretations derive... Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1978."; May 1980.; Includes location map. 45 x 50 centimeters Scale 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1974."; May 1980.; Includes location map. 61 x 66 centimeters Scale approximately 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1978."; May 1980.; Includes location map. 50 x 61 centimeters Scale 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
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