TY  - SER
AU  - Martins,L.M.V.
AU  - Rumjanek,N.G.
AU  - Neves,M.C.P.
TI  - Diversity of cowpea nodulating rhizobia isolated from the semi-arid northeastern Region of Brazil
KW  - Feijao de Corda
KW  - Nodulacao
KW  - Rhizobium
KW  - Regiao Semi-Arida
KW  - Nordeste
ER  -