[Comments on the epidemiology and classification of chronic nonspecific lung diseases].
D002908:Chronic Disease; D006801:Humans; D008171:Lung Diseases / Q000145:classification / Q000453:epidemiology*; D009626:Terminology as Topic; D014586:USSR
Nekotorye zamechaniia otnositel'no epidemiologii i klassifikatsii khronicheskikh nespetsificheskikh zabolevanii legkikh.