1990. University of Iowa. 14 × 25 cm. University of Iowa.
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1990. University of Iowa. 14 × 25 cm. University of Iowa.
2000. University of Iowa. 13 × 24 cm. University of Iowa.
2000. University of Iowa. 14 × 26 cm. University of Iowa.
1940. Von Berg, John. 28 × 33 cm. University of Iowa.
1980. University of Iowa. 28 × 43 cm. University of Iowa.
3437. Use of crop land distribution of total land in crops into the principal crops, by region, 1932
1930. Iowa. State Planning Board. Committee on Land Utilization. 1 map black line ; 84 x 114 cm Negative. "Iowa state plan." "Project 1030." "1030-27.". Iowa. State Planning Board.
1930. Iowa. State Planning Board. Committee on Land Utilization. 1 map black line ; 84 x 114 cm Negative. "Iowa state plan." "Project no. 1030." "1030-22.". Iowa. State Planning Board.
1930. Iowa. State Planning Board. Committee on Population Social Trends. 1 map black line ; 83 x 115 cm Negative. "Iowa state plan." "Project 1048." "1048-21.". Iowa. State Planning Board.
1930. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Department of Agriculture and United States. Agricultural Stabilization and Conservation Service.