[Studies on the etiology and epidemiology of chronic bronchitis in various occupational fields].
D000328:Adult; D001991:Bronchitis / Q000453:epidemiology / Q000209:etiology; D002908:Chronic Disease; D004781:Environmental Exposure; D005859:Germany, East; D006801:Humans; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology / Q000209:etiology; D009790:Occupations
Untersuchungen zur Atiologie und Epidemiologie der chronischen Bronchitis in verschiedenen Berufszweigen.