[State of the problem of animal leukoses in the U.S.S.R].
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D007938:Leukemia / Q000453:epidemiology / Q000662:veterinary*; D014586:USSR
Situation du problème des leucoses du bétail en U.R.S.S.