蛋鸡J亚群禽白血病的流行病学调查

彭伏虎;宋念华;陶淑珍;叶汉珍

Epidemiological Investigation of Subgroup J Avian Leukosis in Layers in Hubei Province

PENG Fu-hu;SONG Nian-hua;TAO Shu-zhen;YE Han-zhen

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