Respiratory disease in U.S. soft-coal miners: clinical and etiological considerations. A study of 30 cases.
D001991:Bronchitis; D003031:Coal; D006801:Humans; D012129:Respiratory Function Tests; D012131:Respiratory Insufficiency; D012829:Silicosis
D003031:Coal
BRONCHITIS; RESPIRATORY FUNCTION TESTS; RESPIRATORY INSUFFICIENCY; SILICOSIS