TY - JOUR AU - Fitzgerald, JA AU - Newman, PH DO - doi:10.1302/0301-620X.58B2.932080 UR - https://doi.org/10.1302/0301-620X.58B2.932080 TI - Degenerative spondylolisthesis T2 - The Journal of Bone & Joint Surgery British Volume VL - 58-B IS - 2 PY - 1976 SP - 184 EP - 192 ER -