Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol BKN. Form of individual image numbering: BKN-4MM-[number]. Year Flown 1972. Flown by Harold Hoskins & Assoc. Lincoln, Nebr. Scale, 1:48,000 Contact the Map Collection at The University of Iowa Libraries: http://www.lib.uiowa.edu/maps/contact/ Scanned at 300 ppi in Greyscale.