1970. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Soil Conservation Service.
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1970. Title supplied by cataloger based on information from sheet label. Image is photoreduction of the mosaic created from original aerial photographs. ... United States. Soil 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.
1950. Kent, Frederick W. (Frederick Wallace), 1894-1984. 6 black & white photographs 12 × 17 cm.
1930. University of Iowa. 35 × 103 cm. University of Iowa.
1930. Iowa. State Planning Board. 1 map on 4 sheets ; black line, plastic; on sheets 77 x 47 cm Some sheets oriented with north to the upper right. Iowa. State Planning Board.
1930. Title supplied by cataloger based on information from sheet label. Image is a photoreduction of the mosaic created from original aerial photographs... United States. Department of Agriculture and United States. Agricultural Stabilization and Conservation Service.
1950. Title supplied by cataloger based on information from sheet label. Image is a photoreduction of the mosaic created from original aerial photographs... United States. Department of Agriculture. Production and Marketing Administration.
1950. Title supplied by cataloger based on information from sheet label. Image is a photoreduction of the mosaic created from original aerial photographs... United States. Commodity Stabilization Service.
1960. 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.