ButterfieldP.G.SpencerP.S., & YatesS. (1999). Back pain-related absenteeism: Differences between small and large companies. Journal of Agricultural Safety and Health, 5(2), 215–255.
2.
U.S. Department of Labor, Bureau of Labor Statistics. (2001). Workplace injury, illness, and fatality statistics. Total recordable cases—injuries and illnesses combines—detailed industry by establishment size—1999 [On-line]. Available: http://stats.bls.gov/ocwc/oshwc/osh/os/ostb0891.pdf
3.
U.S. Department of Labor, Occupational Safety and Health Administration (2001). Statement of Secretary Elaine Chao U.S. Department of Labor before the subcommittee on Labor, Health and Human Services, and Education of the Senate Appropriations Committee April 26, 2001 [On-line]. Available: http://www.osha-slc.gov/OshDoc/Testimony_data/T20010426.html
