1. Backache and sciatica in the army;Ettles;J. Roy. Army M. Corps,1948
2. Idiopathic low back pain and sciatica, 25 years ago and now;Key;Bull. Johns Hopkins Hosp.,1947
3. The herniated intervertebral disc, an analysis of 400 verified cases;Poppen;New England J. Med.,1945
4. Shumate, J. W. Personal communication.
5. Backache, a therapeutic conference;Thibodeau;Bull. New England M. Center,1949