RT Journal Article SR Electronic T1 The Diseases of Occupations JF British Journal of Industrial Medicine JO Br J Ind Med FD BMJ Publishing Group Ltd SP 157 OP 157 DO 10.1136/oem.36.2.157 VO 36 IS 2 A1 K. P. Duncan YR 1979 UL http://oem.bmj.com/content/36/2/157.1.abstract AB