Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol 19075. Form of individual image numbering: 19075-873-[number]. Year flown 1973. Flown by Walker & Assoc. Seattle, Washington. 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.