1. Low back pain in industry: epidemiological aspects;Andersson, G.B.J.;Scand Rehab Med,1979
2. Epidemiological studies of low-back pain;Frymoyer, J.W.; Pope, M.H.; Costanza, M.C.; Rosen, J.C.; Goggin, J.E.; Wilder, D.G.;Spine,1980
3. Bone joint Surg;Am,1983
4. An epidemiological study of acute herniated lumbar intervertebral disc;Kelsey, J.L.;RheumaI-l Rehabil,1975
5. Occupational causes of low-back pain;Walsh, K.; Varnes, N.; Osmond, C.; Styles, R.; Coggon, D.;Sand Jf Work Environ Health,1989