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龙北国, 王江海, 宋鸿遇. 紫云英根瘤菌胞外多糖缺失变种及其结瘤性状的变化[J]. 生理学报 1992; 44 (3): .

Long Beiguo, Wang Jianghai, Song Hongyu. Exopolysaccharide-deficient mutants of Rhizobium astragalus and their nodulation on the host plants. Acta Physiol Sin 1992; 44 (3): (in Chinese with English abstract).