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Persistence of live attenuated infectious bronchitis virus vaccines in SPF chicks and evidence of la
【机 构】
：
Department of Veterinary Pathology,University of Liverpool,UK,CH64 7TE
【出 处】
：
15th World Veterinary Poultry Congress(第十五届禽病大会)
【发表日期】
：
2007年1期
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