[Effectiveness of vaccinating poultry against Newcastle disease].
D000818:Animals; D002645:Chickens; D007109:Immunity; D009521:Newcastle Disease / Q000276:immunology*; D011201:Poultry Diseases / Q000276:immunology*; D014611:Vaccination / Q000662:veterinary*
Ob ĕffektivnosti vaktsinatsii ptits protiv bolezni N'iukasla.