File:Photographic copy of pencil-on-tracing paper drawing dated 1955; Robert W. Batcher delineator; Original in collection of Rath drawings and blueprints owned by Waterloo HAER IOWA,7-WATLO,4U-31.tif
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Original file (4,020 × 5,000 pixels, file size: 19.17 MB, MIME type: image/tiff)