TY  - BOOK
AU  - Azam-Ali,  S N
AU  - Squire, G R
TI  - Principles of tropical agronomy
SN  - 085199136X
U1  - 631/635(213.5) 
PY  - 2002///
CY  - UK
PB  - CABI
KW  - Crop performance ratio
ER  -