Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol BZV. Form of individual image numbering: BZV-1M-[number], BZV-2M-[number], BZV-3M-[number], BZV-4M-[number], or BZV-5M-[number]."Flying completed 8-31-53" Flown by Aero Exploration Company, Tulsa, Oklahoma."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/