Notes
1. J.E. Gordon, Structures: Or Why Things Don't Fall Down,(Washington D.C.: Da Capo Press, 2003) 199.
2. J. Pollard, Building Toothpick Bridges (Math Project Series),( New York: Dale Seymour Publications, 1985) 5.
3. B. Graf, Bridges That Changed the World, (Fort Worth: Prestel Publishing, 2005) 12.
4. D. Brown, Bridges: Three Thousand Years of Defying Nature,( Toronto: Firefly Books, 2005) 8.
5. B. Graf, Bridges That Changed the World, (Fort Worth: Prestel Publishing, 2005) 10-11.
6. D. Brown, Bridges: Three Thousand Years of Defying Nature, ( Toronto: Firefly Books, 2005) 19.
7. J.A. and L.A. Hamey, The Roman Engineers, (New York: Cambridge University Press, 1981) 30.
8. D. Brown, Bridges: Three Thousand Years of Defying Nature, (Toronto: Firefly Books, 2005) 20
9. Ibid.
10. D. Brown, Bridges: Three Thousand Years of Defying Nature, (Toronto: Firefly Books, 2005) 24.
11. Greenstein, The World's Greatest Buildings: Masterpieces of Architecture & Engineering, (New York: Time-Life Books, 2000) 188.
12. J.A. and L.A. Hamey, The Roman Engineers, (New York: Cambridge University Press, 1981) 36.
13. J. Dupre, Bridges: A History of the World's Most Famous and Important Spans, (New York: Black Dog & Leventhal, 1997) 19.
14. D. Brown, Bridges: Three Thousand Years of Defying Nature, ( Toronto: Firefly Books, 2005) 26.
15. B. Graf, Bridges That Changed the World, (Fort Worth: Prestel Publishing, 2005) 14.
16. D. Brown, Bridges: Three Thousand Years of Defying Nature, ( Toronto: Firefly Books, 2005) 26.
17. J.E. Gordon, Structures: Or Why Things Don't Fall Down, (Washington D.C.: Da Capo Press, 2003) 198.
18. J. Pollard, Building Toothpick Bridges (Math Project Series), ( New York: Dale Seymour Publications, 1985) 5.
19. J.E. Gordon, Structures: Or Why Things Don't Fall Down, (Washington D.C.: Da Capo Press, 2003) 200.
20. Ibid.
21. C.A. Johmann, Bridges: Amazing Structures to Design, Build & Test (Kaleidoscope Kids), (Charlotte: Williamson Publishing Company, 1999) 44.
22. C. Oxlade, Bridges (Superstructures), (London: Belitha Press Ltd, 1996) 12.
23. D. Brown, Bridges: Three Thousand Years of Defying Nature, ( Toronto: Firefly Books, 2005) 65.
24. R.S. Cortright, Bridging: Discovering the Beauty of Bridges, (New York: Bridge Ink, 1998) 20.
25. G.P. Ceserani, Grand Constructions, (New York: Putnam Juvenile, 1983) 81.
26. B. Graf, Bridges That Changed the World, (Fort Worth: Prestel Publishing, 2005) 12.
27. D. Brown, Bridges: Three Thousand Years of Defying Nature, ( Toronto: Firefly Books, 2005) 13.
28. B. Graf, Bridges That Changed the World, (Fort Worth: Prestel Publishing, 2005) 12.
29. D. Brown, Bridges: Three Thousand Years of Defying Nature, ( Toronto: Firefly Books, 2005) 19.
30. B. Graf, Bridges That Changed the World, (Fort Worth: Prestel Publishing, 2005) 24.
31. C.A. Johmann, Bridges: Amazing Structures to Design, Build & Test (Kaleidoscope Kids), (Charlotte: Williamson Publishing Company 1999)
32. D. Brown, Bridges: Three Thousand Years of Defying Nature, ( Toronto: Firefly Books, 2005) 26.
33. J. Dupre, Bridges: A History of the World's Most Famous and Important Spans, (New York Black Dog & Leventhal, 1997) 47.
34. R.S. Cortright, Bridging: Discovering the Beauty of Bridges, (New York: Bridge Ink, 1998) 330.
35. J. Dupre, Bridges: A History of the World's Most Famous and Important Spans, (New York: Black Dog & Leventhal, 1997) 63.
36. Ibid.
37. R.S. Cortright, Bridging: Discovering the Beauty of Bridges, (New York: Bridge Ink, 1998) 60.
38. J. Dupre, Bridges:A History of the World's Most Famous and Important Spans, (New York: Black Dog & Leventhal, 1997) 75.
39. R.S. Cortright Bridging: Discovering the Beauty of Bridges, (New York: Bridge Ink, 1998) 67.
40. J. Dupre, Bridges: A History of the World's Most Famous and Important Spans, (New York: Black Dog & Leventhal, 1997) 109.
41. Ibid., 44-45.
42. J. Dupre, Bridges: A History of the World's Most Famous and Important Spans, (New York: Black Dog & Leventhal, 1997)44.
43. B. Graf, Bridges That Changed the World, (Fort Worth: Prestel Publishing, 2005) 46.
44. "Summary of Subject Matter",U. S. Department of Transportation, 2006 Status of the Nation. http://transportation.house.gov/.../File/Highways/20071023/10-23%20Highways%20Bridge%20Inspections%20SSM%20 final.pdf. 2.
45. William Marra, "How Safe Are Your State"s Bridges?" in ABC News, 2 Aug. 2007. 1
46. Ibid.
47. "Summary of Subject Matter",U. S. Department of Transportation, 2006 Status of the Nation. http://transportation.house.gov/.../File/Highways/20071023/10- 2 3 %23%20Highways%20Bridge%20Inspections%20SSM%20 final.pdf. 2.
48. C.A. Johmann, Bridges: Amazing Structures to Design Build & Test (Kaleidoscope Kids),( Charlotte: Williamson Publishing Company 1999) 29-30.
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