TY  - BOOK
AU  - Conway,Gordon R.
AU  - Barbier,Edward B.
TI  - After the green revolution: sustainable agriculture fordevelopment 
SN  - 1853830356
U1  - 338.10973 
PY  - 1990///
CY  - London
PB  - Earthscan Publications, 
KW  - AGRICULTURA
KW  - ASPECTOS ECONOMICOS
ER  -