Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol BKO. Form of individual image numbering: BKO-1HH-[number], BKO-2HH-[number], BKO-3HH-[number], or BKO-5HH-[number]. "Year Flown 1967". Flown by Utility Data Corporation, Kansas City, MO. "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/