American Institute of Steel Construction (1956). "Prize Bridges 1928–1956". AISC. Archived from the original on August 19, 2016. Retrieved July 27, 2015.
Walsh, Everett L. (July 1936). "Tower Bridge Wins National Award"(PDF). California Highways and Public Works. 14 (7). California Department of Public Works: 8–9, 27. Retrieved July 27, 2015.
American Institute of Steel Construction (1956). "Prize Bridges 1928–1956". AISC. Archived from the original on August 19, 2016. Retrieved July 27, 2015.