title: [Distribution of leukosis-sarcoma complex viruses among birds].
mesh_terms: D001355:Alpharetrovirus; D000818:Animals; D001353:Avian Leukosis / Q000453:epidemiology*; D002645:Chickens; D004372:Ducks; D011201:Poultry Diseases / Q000453:epidemiology*; D012509:Sarcoma / Q000453:epidemiology / Q000662:veterinary*; D014586:USSR
vernacular_title: Rasprostranenie virusov leĭkozno-sarkomatoznogo kompleksa sredi ptits.