RT Journal Article SR Electronic T1 Pneumoconiosis in Boiler Scalers JF British Journal of Industrial Medicine JO Br J Ind Med FD BMJ Publishing Group Ltd SP 256 OP 264 DO 10.1136/oem.8.4.256 VO 8 IS 4 A1 H. E. Harding A1 A. P. Massie YR 1951 UL http://oem.bmj.com/content/8/4/256.abstract AB