Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol BKT. Form of individual image numbering: BKT-1CC-[number]."Year flown 1961" Flown by Woltz Studios, Inc. Des Moines, 13, Iowa."Approximate scale, 1:20,000" [refers to individual images from which mosaic was made].
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