1940. Includes chart showing type of land use, acreage, and recommended use. Scale not given. Prepared by Crawford County Land Use Planning Committee. The Committee.
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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.).