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  • Bloomfield, Louis A. "How Things Work: The Physics of Everyday Life." 2nd Ed. John Wiley & Sons, Inc, New York: 2001
  • Byrnes, Mike. "How to Prepare for the CDL." Barron's Educational Series, 2003. [Sept. 17, 2008] http://books.google.com/books?id=D7aSXfgOFEAC
  • Carraba, Jim. "Trailer Safety Tips." NYCAMH/NEC. Country Folks Grower. June 5, 2006. [Sept. 17, 2008] http://www.nycamh.com/resources/safety_pubs/entry_detail.asp?article=58
  • Land Transport NZ. "Loading and towing safely." Land Transport New Zealand. [Sept. 17, 2008] http://www.ltsa.govt.nz/road-user-safety/motorists/loading-towing-safely.html
  • Martin, Joe. "Trailer Loading and Towing Guide." Sherline Products, Inc. [Sept. 17, 2008] http://www.sherline.com/lmbook.htm