1. Colton's railroad & commercial map of the United States & Canada. Maps Pennsylvania State University Public content 1872. G.W. & C.B. Colton & Co. Railroads--United States--Maps. G.W. & C.B. Colton & Co.
2. Watson's American Republic and rail road map of the United States Maps Pennsylvania State University Public content 1872. Watson, Gaylord. Scale not determined; 1 map: color; 76 x 106 cm Railroads--United States--Maps. Perry & Spaulding.