Sources
Commonwealth of Pennsylvania, Pennsylvania Historical and Museum Commission: Pennsylvania Department of Transportation. Historic highway bridges in Pennsylvania. Harrisburg: Penn, 1986.
Comp, T. Allan, and Donald C. Jackson "Bridge Truss Types: A guide to dating and identifying." American Association for State and Local History Technical Leaflet 95, History News 32 (1977): 1-12.
Cridlebaugh, Bruce S. "Bridge Basics - A Spotter's Guide to Bridge Design." Bridges and Tunnels of Allegheny County and Pittsburgh, Pennsylvania. 18 February 2000. http://pghbridges.com/basics.htm (11 November 1999).