TY  - BOOK
AU  - Norman ,MJT
AU  - Searle,PGE
TI  - Tropical food crops in their environment
SN  - 0521586895
U1  - 630 
PY  - 1996///
CY  - USA
PB  - Combridge University Press
KW  - Cereals
KW  - Cropping systems
ER  -