Title supplied by cataloger based on information from sheet label. Image is a photoreduction of the mosaic created from original aerial photographs. Designating symbol BZZ. Form of individual image numbering: BZZ-1A-[number], BZZ-2A-[number], BZZ-3A-[number], BZZ-4A-[number], or BZZ-5A-[number]."Flying completed 10-16-40." Flown by Aero Service Corp. Philidelphia, Pa. "Approximate scale, 1:20,000" [refers to individual images from which mosaic was made].
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