[Virus etiology and the epidemiology of leukosis].
D000818:Animals; D001353:Avian Leukosis / Q000209:etiology; D002417:Cattle; D002645:Chickens; D003168:Complement Fixation Tests; D006801:Humans; D007938:Leukemia / Q000209:etiology*; D051379:Mice; D009858:Oncogenic Viruses
Virusnaia étiologiia i épidemiologiia leĭkozov.