[Analysis of respiratory virus infections in the GDR (4th quarter 1971)].
D004196:Disease Outbreaks; D005260:Female; D005859:Germany, East; D006801:Humans; D008297:Male; D012141:Respiratory Tract Infections / Q000453:epidemiology*; D014777:Virus Diseases / Q000453:epidemiology*
Analyse respiratorischer Virusinfektionen in der DDR (IV. Quartal 1971.