@INBOOK {GUEYE:1990, title = {Maximiser la fixation biologique de l'azote pour la production agricole et forestiere en Afrique}, author = {Gueye, M. * and Mulongoy, K. and Dommergues, Y. }, year = {1990}, volume = {2}, type = {Illeme Conference de l'AABNF, 7-12 Nov 1988, Dakar, Senegal}, number = {2}, publisher = {Collection Actes de l'ISRA}, address = {Dakar, Senegal}, }