TY  - BOOK
AU  - Giller, Ken E.
TI  - Nitrogen fixation in Tropical cropping systems
U1  - 631.847 G37N 
PY  - 1991///
CY  - Wallingford
PB  - C.A.B. Int.
KW  - NITROGEN -- FIXATION
KW  - CROPPING SYSTEM -- TROPICS
ER  -