TY - JOUR AU - Schurr, Peter H. DO - doi:10.1302/0301-620X.37B4.601 UR - https://doi.org/10.1302/0301-620X.37B4.601 TI - SACRAL EXTRADURAL CYST: AN UNCOMMON CAUSE OF LOW BACK PAIN T2 - The Journal of Bone & Joint Surgery British Volume VL - 37-B IS - 4 PY - 1955 SP - 601 EP - 605 ER -