[Status and problems of controlling enzootic leukemia in cattle in Bulgaria].
D000818:Animals; D002031:Bulgaria; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control* / Q000635:transmission; D007938:Leukemia / Q000517:prevention & control / Q000635:transmission / Q000662:veterinary*
Sŭstoianie i problemi na borbata s enzootichnata levkoza po govedata u nas.