Hernandez, B S Increased Effectiveness of Competitive Rhizobium Strains upon Inoculation of Cajanus cajan. [electronic resource] - Applied and environmental microbiology Sep 1987 - 2066-8 p. digital Publication Type: Journal Article ISSN: 0099-2240 Standard No.: 10.1128/aem.53.9.2066-2068.1987 doi