[Problems control of avian tumor viruses and viral vaccines].
D001355:Alpharetrovirus / Q000472:pathogenicity*; D009369:Neoplasms / Q000517:prevention & control; D009858:Oncogenic Viruses / Q000472:pathogenicity*; D014765:Viral Vaccines / Q000009:adverse effects*
D014765:Viral Vaccines
Az avian tumor virusok és a virusvaccinák ellenörzésének problémái.