RT Journal Article SR Electronic T1 Coal and the lung JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 397 OP 397 DO 10.1136/thx.39.5.397 VO 39 IS 5 A1 Oldham, PD YR 1984 UL http://thorax.bmj.com/content/39/5/397.1.abstract AB