1. U.S. Bureau of Labor Statistics. Occupational Injuries and Ill-nesses: Counts, Rates, and Characteristics, 1992. U.S. Department of Labor Bulletin 2455, U.S. Government Printing Office, Wash-ington, D.C., April 1995.
2. U.S. Bureau of Labor Statistics. U.S. Occupational Injuries and Ill-nesses in the United States by Industry, 1991. U.S. Department of Labor. U.S. Government Printing Office, Washington, D.C., May 1993.