TY  - RPRT
TI  - Back problems. Historical perspective and clinical indications.
AU  - L B Jeffcott
PY  - 1999
DO  - 10.1016/s0749-0739(17)30160-8
UR  - https://pubmed.ncbi.nlm.nih.gov/10218238/
ID  - 10218238
ER  -