Title supplied by cataloger based on information from sheet label. Image is a photoreduction of the mosaic created from original aerial photographs. Designating symbol SS. Form of individual image numbering: SS-1T-[number], or SS-2T-[number]."Flying completed 9-30-57" Flown by Robinson Aerial Surveys, Inc. Newark 7, N.J. "Approximate scale, 1:20,000" [refers to individual images from which mosaic was made]. Contact the Map Collection at The University of Iowa Libraries: http://www.lib.uiowa.edu/maps/contact/