[Complex study of free-living birds].
D000818:Animals; D001717:Birds; D003604:Czechoslovakia; D004197:Disease Reservoirs; D004671:Encephalitis, Arbovirus / Q000662:veterinary*; D004675:Encephalitis, Tick-Borne; D009956:Psittacosis / Q000453:epidemiology*; D014124:Toxoplasmosis, Animal / Q000453:epidemiology*
Komplexní průzkum volnĕ zijících ptáků.