1. Bureau of Labor Statistics.Occupational injuries and illnesses in the United States by industry, 1989: U.S. Department of Labor, Bulletin 2379. Washington, D.C.: U.S. Government Printing Office.
2. New York State Workers' Compensation Board.Compensated cases closed, 1988.
3. Business Council of New York State.BNA Workers' Compensation Report, 1993.
4. New York State Workers' Compensation Board. Office of Research and Statistics, 1993.
5. California Department of Insurance, Office of Policy Research.Lowering workers' compensation insurance costs by reducing injuries and illnesses at work, February 1993.