00000cam a22000004a 4500 UP-8027390931313348058 Buklod 20070912115929.0 m |o d | ta 990611s1991 nyu r b |||0 1| d 0851986714 (iLib)UPVIS-00000008506 QR89.7 G44 $c1991 Giller, K. E. (Ken E.) Nitrogen fixation in tropical cropping systems Ken E. Giller. United Kingdom C.A.B. International c1991. 313p. Nitrogen Fixation. Genetic engineering. Micro-organisms, Nitrogen fixing. Science and Tech. Science. UPVIS UPV-ML QR89.7 .G44 1991 Book