Ensifer fredii (Scholla and Elkan) Young
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Buendia-Claveria AM, et al. A comparative study of the physiological characteristics, plasmid content and symbiotic properties of different Rhizobium fredii strains. Syst. Appl. Microbiol. 12: 203-209, 1989.
Buendia-Claveria AM, et al. Evaluation of the symbiotic properties of Rhizobium fredii in European soils. Syst. Appl. Microbiol. 17: 155-160, 1994.