[Analysis of respiratory virus infections in the German Democratic Republic during the third quarter of the year 1971].
D005859:Germany, East; D006801:Humans; D012141:Respiratory Tract Infections / Q000453:epidemiology* / Q000382:microbiology; D014777:Virus Diseases / Q000453:epidemiology*
Analyse respiratorischer Virusinfektionen in der DDR für das 3. Quartal 1971.