Trachtenberg, Marvin, and Isabelle Hyman. Architecture From Prehistory To Post-Modernism. Harry N. Abrams, Inc, 1986.

Pelta, Kathy. Bridging the Golden Gate. Lerner Publications Company, 1987.

Internet Sources

Cridlebaugh, Bruce. 4/11. http://pghbridges.com/basics.htm.