RT Journal Article SR Electronic T1 Text-book of Orthopaedic Medicine, Vol. I JF British Journal of Industrial Medicine JO Br J Ind Med FD BMJ Publishing Group Ltd SP 83 OP 83 DO 10.1136/oem.21.1.83 VO 21 IS 1 A1 Burrows, J. R. YR 1964 UL http://oem.bmj.com/content/21/1/83.1.abstract AB