Clone and Sequencing of NA Genes of 10 H9N2 AIV Strains with Different Ages
YANG Da-guang, WANG Xin-wei, WANG Ze-lin, ZHOU Xin
ACTA AGRICULTURAE BOREALI-SINICA . 2008, (6): 58 -63 .  DOI: 10.7668/hbnxb.2008.06.013