Title supplied by cataloger based on information from sheet label. Image is a photoreduction of the mosaic created from original aerial photographs. Designating symbol BKH; form of individual image numbering: BKH-1-[number], BKH-2-[number], BKH-3-[number], BKH-4-[number], BHF-5-[number], or BKH-6-[number]."Date of completion December 13, 1938" Flown by Iowa Aerial Surveys, Des Moines, Iowa. "Approximate scale, 1:20,000" [refers to individual images from which mosaic was made]. Library's copy 2 consists of photographic negatives (4 x 5 in.) corresponding to each of the images in its copy 1.
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