TY  - BOOK
AU  - Ragland, John
TI  - Technologies for sustainable agriculture in the tropics
U1  - 630 R13T 
PY  - 1993///
CY  - Madison
PB  - American Society of Agronomy
KW  - AGRICULTURE - TROPICS - CONGRESSE
KW  - AGRICULTURE - DEVELOPING - COUNTRIES - CONGRES
ER  -