1. Back Disorders and Whole-Body Vibration at Work;Bongers,1990
2. Investigation of the relation between low back pain and occupation. 3 Physical requirements, sitting, standing and weight lifting;Magora;Industr Med Surg,1972
3. An epidemiological study of acute herniated intervertebral discs;Kelsey;Rheum Rehabil,1975
4. Epidemiologic studies of low back pain;Frymoyer;Spine,1980
5. The relationship between truck and tractor driving and disorders of the spine and supporting structures;Fishbein;Industr Med Surg,1950