%0 Journal Article %A J. A. Shipley %A C. A. Beukes %T The nature of the spondylolytic defect %D 1998 %J The Journal of Bone & Joint Surgery British Volume %P 662-664 %V 80-B %N 4 %R 10.1302/0301-620X.80B4.0800662 %U https://doi.org/10.1302/0301-620X.80B4.0800662 %K