TY - JOUR AU - Morgan, Francis P. AU - King, Thomas DO - doi:10.1302/0301-620X.39B1.6 UR - https://doi.org/10.1302/0301-620X.39B1.6 TI - PRIMARY INSTABILITY OF LUMBAR VERTEBRAE AS A COMMON CAUSE OF LOW BACK PAIN T2 - The Journal of Bone & Joint Surgery British Volume VL - 39-B IS - 1 PY - 1957 SP - 6 EP - 22 ER -