RT Journal Article SR Electronic T1 The Black Book JF British Journal of Industrial Medicine JO Br J Ind Med FD BMJ Publishing Group Ltd SP 267 OP 267 DO 10.1136/oem.35.3.267 VO 35 IS 3 A1 Zinovieff, A. YR 1978 UL http://oem.bmj.com/content/35/3/267.1.abstract AB