title: Lung function in coal workers in relation to age and to size and profusion of small pneumoconiotic opacities.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000403:Airway Resistance; D001784:Blood Gas Analysis; D003032:Coal Mining; D006801:Humans; D008176:Lung Volume Measurements; D008875:Middle Aged; D011009:Pneumoconiosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011859:Radiography