[EFFECT OF WORK IN THE COAL MINES ON THE PATHOGENESIS OF CHRONIC BRONCHITIS].
D001991:Bronchitis; D029481:Bronchitis, Chronic; D003031:Coal; D003032:Coal Mining; D003604:Czechoslovakia; D006801:Humans
D003031:Coal
BRONCHITIS; COAL MINING; CZECHOSLOVAKIA
VLIV PR'ACE V UHELN'YCH DOLECH NA VZNIK VLEKL'EHO Z'AN ETU PRUDU SEK.