PREVALENCE OF BOVINE LEUKEMIA VIRUS IN BLACK AND WHITE COWS WITH THE DIFFERENT LEVEL OF MILK PRODUCTIVE TRAITSMikhailova M.E.,ZINOVIEVA N.A.,GLADYR’ E.A.,Ernst L.K.,Molofeeva L.A.,Vinogradova I.V.
Agricultural Biology, 2012, 6, С. 10-13
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