TY - BOOK AU - Graham, P.H., ed. AU - Sadowsky , M.J., ed. AU - Vance , C.P., ed. ED - North American Conference on Symbiotic Nitrogen Fixation TI - Symbiotic nitrogen fixation: proceedings of the fourteenth North American conference held at University of Minnesota, Minnesota, USA on 25-29 July, 1993 SN - 0792327810 U1 - 572.5452 21st ed. PY - 1994/// CY - Boston PB - Kluwer Academic Publishers KW - Conferences KW - Nitrogen fixation KW - Rhizobium KW - Symbiosis ER -