鸡新城疫La Sota株、鸡传染性支气管炎W93株二联活疫苗研究Ⅱ.接毒剂量选择试验
계신성역La Sota주、계전염성지기관염W93주이련활역묘연구Ⅱ.접독제량선택시험
Study on the newcastle disease(La Sota strain)and infectious bronchitis (W93 strain) living vaccine Ⅱ.Tests of inoculation doses
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