RT Journal Article SR Electronic T1 Minimal Pulmonary Tuberculosis Found by Mass Radiography (Fluorography) JF British Journal of Industrial Medicine JO Br J Ind Med FD BMJ Publishing Group Ltd SP 138 OP 138 DO 10.1136/oem.14.2.138 VO 14 IS 2 A1 E. Posner YR 1957 UL http://oem.bmj.com/content/14/2/138.1.abstract AB