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-1F-[number], DE-2F-[number], DE-3F-[number], or DE-4F-[number]. "Flying completed 9-1-49." Flown by Woltz Studios, Des Moines, Iowa. "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/