References
- U.S. Department of Labor, Occupational Safety and Health Administration . June 1989 . OSHA Instruction CPL 2.45B. The Revised Field Operations Manual June , Washington, D.C. : USOL/OSHA .
- Department of Labor, Occupational Safety and Health Administration . May 4 1993 . Lead Exposure in Construction; Interim Final Rule, 29 CFR Part 1926 May 4 , 26590 – 26649 . Federal Register .
- U.S. Department of Labor, Occupational Safety and Health Administration . April 1993 . OSHA Instruction CPL 2–2.20B CH-2. The OSHA Technical Manual April , Washington, D.C. : USDOL/OSHA .
- U.S. Department of Labor, Occupational Safety and Health Administration . July 1991 . OSHA Instruction CPL 2–2.43A. The Chemical Information Manual July , Washington, D.C. : USDOL/OSHA .