Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol DE. Form of individual image numbering: DE-1A-[number], DE-2A-[number], or DE-3A-[number]."Flying completed 9-12-40." Flown by Aero Service Corp. Philidelphia, Pa."Approximate scale, 1:20,000" [refers to individual images from which mosaic was made].4 pages61 × 51 cmislandora: api_786https://digital.lib.uiowa.edu/node/41482engUnited States. Agricultural Adjustment AdministrationAero Service CorporationUniversity of Iowa. Libraries. Map CollectionPublicMonona County, Iowa, 1940, aerial photomosaic indexImageryIowa--Monona CountyIowa1940-1950University of Iowa