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Gualter, R. M. R.; Boddey, R. M.; Rumjanek, N. G.; de Freitas, A. C. R.; Xavier, G. R. Agronomic Efficiency of Rhizobia Strains in Cowpea Cultivated in the Pre‑Amazon Region, in Maranhão State. PAB 2011, 46 (3), 303-308. https://doi.org/10.1590/S1678-3921.pab2011.v46.9771.