1979. United States. Soil Conservation Service. Includes location map. Scale 1:50,000.
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1979. United States. Soil Conservation Service. Includes location map. Scale 1:50,000.
1979. United States. Soil Conservation Service. Includes notes and location map. Scale 1:50,000.
1979. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map compiled in 1976; interpretations derived from soil map constructed 1972.; "Projection and 10,000-meter... Dept. of Agriculture, Soil Conservation Service (Washington.).