1980. University of Iowa. 28 × 43 cm. University of Iowa.
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1980. United States. Soil Conservation Service. Important farmlands in Warren County. Map color coded by prime, unique and additional farmland, water areas and urban and built-up areas. Land data... U. S. Government Printing Office.
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.
1980. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated 1976; interpretations derived from soil map constructed 1977.; "Projection and 10,000-meter grid ... Dept. of Agriculture, Soil Conservation Service (Washington.).
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.
1980. United States. Soil Conservation Service. Base source: USGS county base map dated 1975; interpretations derived from soil map constructed 1970.; "Projection and 10,000-metre grid ticks, zon... 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.).
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.