1940. Iowa. Department of Transportation. color maps.
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1940. Iowa. Department of Transportation. color maps.
1940. Iowa. Department of Transportation. color maps.
1940. Iowa. Department of Transportation. color maps.
1940. Color reproduction by Bureau of Agricultural Economics, U.S.D.A.; Includes chart showing type of land use, acreage, and recommended use. Scale not ... U.S. Bureau of Agricultural Economics.
1940. 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.
1940. University of Iowa. 23 × 27 cm. University of Iowa.
1940. University of Iowa. 23 × 27 cm. University of Iowa.
1940. University of Iowa. 23 × 40 cm. University of Iowa.
1940. University of Iowa. 23 × 40 cm. University of Iowa.