Mutation Characteristics Analysis of F Genes of Two Strains Genotype Ⅱ Newcastle Disease Virus from Yunnan Province
ZHANG Wen-dong，SONG Jian-ling，ZHAO Huan-yun，LIU Qing-liang，HU Yuan-yuan，ZENG Wei， ZHANG Fu-qiang
中国畜牧兽医 . 2014, (7): 54 -59 .