TY  - JOUR
AU  - Lettin, A. W. F.
DO  - doi:10.1302/0301-620X.49B3.520
UR  - https://doi.org/10.1302/0301-620X.49B3.520
TI  - DIAGNOSIS AND TREATMENT OF LUMBAR INSTABILITY
T2  - The Journal of Bone & Joint Surgery British Volume
VL  - 49-B
IS  - 3
PY  - 1967
SP  - 520
EP  - 529
ER  -