1930. Iowa. State Planning Board. Committee on Land Purchase & Mortgage. 1 map black line ; 84 x 115 cm Iowa state plan. "Project no. 1031.". Iowa. State Planning Board.
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1920. Iowa. State Planning Board. Committee on Land Purchase & Mortgage. 1 map black line ; 84 x 115 cm Iowa state plan. "Project no. 1031.". Iowa. State Planning Board.
1930. Iowa. State Planning Board. Committee on Land Purchase & Mortgage. 1 map black line ; 84 x 114 cm Iowa state plan. "Project no. 1031.". Iowa. State Planning Board.
1930. Iowa. State Planning Board. Committee on Land Purchase & Mortgage. 1 map black line ; 71 x 110 cm Iowa state plan. "Project no. 1031.". Iowa. State Planning Board.
1900. Calvin, S. (Samuel), 1840-1911. 1 map Scale not given. Iowa Geological Survey.
1920. Kay, George F. (George Frederick), 1873-1943. 1 map Scale not given. Iowa Geological Survey.
1836. Featherstonhaugh, George William, 1780-1866. 22 cm.);Printed by Gales and Seaton, 1835. (97 p., [1] folded leaf of plates : ill.;1 map;67 x 96 cm.;1:1,013,760 or 16 miles to 1 inch. [Washington, D.C. : s.n.].
1850. Thomas, Cowperthwait & Co. 1 map : color Scale approximately 1:1,805,760 W 97°00′--W 89°07′/N 44°30′--N 39°46′. Thomas, Cowperthwait & Co.
1850. Thomas, Cowperthwait & Co. 1 color map 30 x 37 cm, on sheet 35 x 42 cm Scale [ca. 1:1,805,760]. Thomas, Cowperthwait & Co.
1850. Thomas, Cowperthwait & Co. 1 color map 30 x 37 cm, on sheet 35 x 43 cm. Scale [ca. 1:1,805,760]. Thomas, Cowperthwait & Co.
1850. Thomas, Cowperthwait & Co. 1 color map 30 x 37 cm, on sheet 35 x 43 cm. Scale [ca. 1:1,805,760]. Thomas, Cowperthwait & Co.
1860. Desilver, Charles. 1 color map Scale approximately 1:1,875,000. Scale [ca. 1:1,875,000]. Charles Desliver.
1850. Henn, Williams and Co. 1 map Scale approximately 1:1,140,480. W 96°40′--W 90°00′/N 43°30′--N 40°25′. J.F. Abrahams and R.L. Barnes.
1850. Henn, Williams & Co. 1 color map 55 x 88cm Scale not given. Henn, Williams & Co. and R.L. Barnes.
1930. Iowa. State Planning Board. Committee on Land Utilization. 1 map black line ; 83 x 113 cm Negative. "Effective acreage = total farm land leass land in forest, waste, buildings, roads, and feed lots." "Iowa... 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.
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.
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.
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.