RT Journal Article SR Electronic T1 Reply to Professor Macpherson's critique JF British Journal of Industrial Medicine JO Br J Ind Med FD BMJ Publishing Group Ltd SP 76 OP 78 DO 10.1136/oem.26.1.76 VO 26 IS 1 A1 Wyndham, C. H. A1 Allen, A. McD. A1 Bredell, G. A. G. A1 Andrew, R. YR 1969 UL http://oem.bmj.com/content/26/1/76.abstract AB