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曾维清, 宋鸿遇. 紫云英根瘤菌107菌株exo基因簇非连锁突变位点的克隆[J]. 生理学报 1997; 49 (4): .

Zeng Weiqing, Song Hongyu. Cloning of an unlinked exo site from EPS synthesis deficient mutants of Rhizobium astragali strain 107. Acta Physiol Sin 1997; 49 (4): (in Chinese with English abstract).