[Epidemiologic features of ornithosis in Leningrad].
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009956:Psittacosis / Q000453:epidemiology*; D012426:Russia; D012621:Seasons; D014505:Urban Population
Nekotorye cherty épidemiologii ornitoza v Leningrade.