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Brittom, Ian. "Iron Bridge." Freefoto.com. Ian Britton, n.d. Web. 14 Jan. 2013. <http://www.freefoto.com/preview/11-43-7/Ironbridge-The-world-s-first-and-finest-iron-bridge-opened-in-1781->.
Budd Railcars in 1952 - "Clear Iron" - American Railroads and Passenger Tr. Youtube.com. You, n.d. Web. 13 Jan. 2013. <http://www.youtube.com/watch?v=AGP8EI8aY9g>.
Say, Does Not. Iron- Periodic Table of Videos. Youtube.com. Yourself, n.d. Web. 13 Jan. 2013. <http://www.youtube.com/watch?v=euQUgp5AY-Y>.
U.S History. Independence Hall, n.d. Web. 12 Jan. 2013. <http://www.ushistory.org/us/25b.asp>.
U.S History. N.p., n.d. Web. 15 Jan. 2013. <http://www.ushistory.org/us/36c.asp>.