title: [INVESTIGATIONS ON CHRONIC BRONCHITIS AS A DISEASE OF THE MASSES].
mesh_terms: D001991:Bronchitis; D029481:Bronchitis, Chronic; D004813:Epidemiology; D006801:Humans; D006814:Hungary; D012907:Smoking
keywords: BRONCHITIS; EPIDEMIOLOGY; HUNGARY; SMOKING
vernacular_title: AZ IDUELT HOERGHURUT N'EPBETEGS'EG JELLEG'ERE VONATKOZ'O VIZSG'ALATOK.