ROENTGENOLOGIC OBSERVATIONS ON 412 CASES OF ANTHRACOSILICOSIS IN  COAL MINERS.
D000874:Anthracosilicosis; D002681:China; D003031:Coal; D003933:Diagnosis; D006801:Humans; D008906:Mining; D013902:Radiography, Thoracic
D003031:Coal
ANTHRACOSILICOSIS; CHINA; DIAGNOSIS; MINING; THORACIC RADIOGRAPHY