Map of Philadelphia showing population in year 1920, as enumerated in U.S. Census, and existing electric railway system
Shows radial distances and unelectrified railroads. Also shows unelectrified railroads. Also covers adjacent suburbs. Scale ca. 1:43,000. Available also through the Library of Congress Web site as a raster image. AACR2: 651/1; 651/2; 650/3; 650/4
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