China Animal Husbandry & Veterinary Medicine ›› 2007, Vol. 34 ›› Issue (3): 110-112.
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ZHAO Jinfeng1, YANG Guangcheng2, ZHOU Shouying1, JIAN Fuchun1, LI Tongyi2, LI Dezhong2, NING Changshen1, ZHANG Longxian1