1[2]Lomniczi B,Whemann E,Herczeg J,et al.Newcastle disease outbreaks in recent years in western Europe were caused by an old(Ⅵ)and a novel genotype(Ⅶ)[J].Arch Virol,1998,143:49-64.
2Lomniczi B, Whemann E, Herczeg J, et al. Newcastle disease outbreaks in recent years in western Europe were caused by an old(Ⅵ) and a novel genotype(Ⅶ) [J]. Arch Virol, 1998, 143:49-64.