%0 Journal Article %A S Eisenstein %T The trefoil configuration of the lumbar vertebral canal. A study of South African skeletal material %D 1980 %J The Journal of Bone & Joint Surgery British Volume %P 73-77 %V 62-B %N 1 %R 10.1302/0301-620X.62B1.7351439 %U https://doi.org/10.1302/0301-620X.62B1.7351439 %K