6The Occupational Safety and Health Administration (OSHA) Data Base 1990--2000[DB]. U.S. Department of Labor, Occupational Safety and Health Administration, Washington, D.C.
7The Occupational Safety and Health Administration (OSHA) Data Base 2001--2008[DB]. U.S. Department of Labor, Occupational Safety and Health Administration, Washington, D.C.
8Loughborough University and UMIST. Casual factors in construction accidents[ R]. Health & Safety Executive, 2003.