Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol DH form of individual image numbering: DH-1-[number], DH-2-[number], DH-3-[number], DH-4-[number], or DH-5-[number]. Date of publication inferred from dates on individual photographs within the mosaic. Flown by Aerial Exploration, Inc., New York, N.Y. "Approximate scale, 1:20,000" [refers to individual images from which mosaic was made].Contact the Map Collection at The University of Iowa Libraries: http://www.lib.uiowa.edu/maps/contact/JPEGui:api_1116engUnited States. Department of AgricultureUnited States. Agricultural Stabilization and Conservation ServicePublicIowa County, Iowa, 1936, aerial photomosaic indexImageryIowa--Iowa CountyIowa1930-1940University of Iowa