海原县部分鸡场新城疫免疫现状调查

张成莲,汪仁莉

Investigation on Immune Condition against Newcastle Disease at Some Henneries in Haiyuan County

畜牧与饲料科学 . 2009, (9): 150 -150 . DOI: 10.12160/j.issn.1672-5190.2009.09.072