Animal Husbandry and Feed Science ›› 2013, Vol. 34 ›› Issue (11): 82-82.doi: 10.12160/j.issn.1672-5190.2013.11.037
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ZHANG Yan-ying, JIA Qing-hui, ZHANG Xiang-zhai (Key Laboratory of Hebei Province Preventive Veterinary Medicine, Hebei Normal University of Science & Technology, Qinhuangdao 066004,China)