Associative N2-fixation - Vose, Peter B.; Vose, Peter B.; Ruschel, Alaides P.; Ruschel, Alaides P. (CRC Press, 1981)
"Proceedings of the International Workshop of Associative N2-Fixation. July 2-6, 1979, held at Centro de Energia Nuclear na Agricultura, University of Sao Paulo, Piracicaba, Brazil."