Title supplied by cataloger based on information from sheet label. Image is a photoreduction of the mosaic created from original aerial photographs. Designating symbol BZN. Form of individual image numbering: BZN-1K-[number], BZN-2K-[number], BZN-3K-[number], BZN-4K-[number], or BZN-5K-[number]. Date of publication inferred from dates on individual photographs within the mosaic. "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/