1. Idiopathic Low Back Pain—25 Years Ago and Now;Key;Bull. Johns Hopkins Hosp,1947
2. Mechanisms of Nerve-Root Compression and Irritation in Backache;Gill;Clin. Orthopedics,1955
3. Backache and Sciatic Pain;Ghormley;Clin. Orthopedics,1953
4. Protrusion of Lumbar Intervertebral Discs;O'Connell;J. Bone & Joint Surg,1951
5. Protrusion of Intervertebral Disk;Burns;Lancet,1945