[The prevalence of chronic bronchitis among the urban population in the slate producing region of the Estonian SSR].
D000328:Adult; D001991:Bronchitis / Q000453:epidemiology*; D002908:Chronic Disease; D004781:Environmental Exposure; D004957:Estonia; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008903:Minerals; D008906:Mining; D014505:Urban Population
D008903:Minerals
Rasprostranennost' khronicheskogo bronkhita sredi gorodskogo naseleniia slantsepromyshlennogo raĭona Estonskoĭ SSR.