Title supplied by cataloger based on information from sheet label. Image is a photoreduction of the mosaic created from original aerial photographs. Designating symbol BZL. Form of individual image numbering: BZL-1F-[number], or BZL-2F-[number]."Flying completed 7-4-49." 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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