Sources
Anderson, Norman D. and Brown, Walter R. Ferris Wheels. Pantheon Books. New
York 1983.
Petrosky, Henry. Remaking The World. Alfred A. Knopf. New York 1997.
ecss.eng.iastate.edu/explorer/park/fwm.htm
users.vnet.net/schulman/Columbian/ferris.html
www.ferriswheels.com
www.clpgh.org/exhibit/neighborhoods/northside/nor_n105.html