Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol BKC; form of individual image numbering: BKC-1-[number], BKC-2-[number], BKC-3-[number], BKC-4-[number], BKC-5-[number], or BKC-6-[number]. "Date of completion Feb. 9, 1939". Flown by Iowa Aerial Surveys, 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/