Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs. Designating symbol SZ. Form of individual image numbering: SZ-1H-[number], SZ-2H-[number], SZ-3H-[number], SZ-4H-[number], or SZ-5H-[number]."Flying completed 9-19-51" Flown by Woltz Studios, Des Moines, Iowa."Approximate scale, 1:20,000" [refers to individual images from which mosaic was made].
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