1. National Institute for Occupational Safety and Health: Work Practices Guide for Manual Lifting. Washington, DC: Dept. of Health and Human Services, 1981.
2. Physiology of Exercise;Lamb,1978
3. Dept. of Industrial Relations. Back Strains—Incidence Rates by Industry. In Work Injuries and Illnesses, California QIAQ, 1982;54:2–4.
4. Reliability and reproducibility of clinical findings in low back pain;Nelson;Spine,1979
5. Epidemologic aspects of low-back pain in industry;Andersson;Spine,1981