TY  - BOOK
AU  - Symoens,J.J.
ED  - Agricultural intensification and environment in tropical areas : sem inar 
ED  - Technical Centre for Agricultural and Rural Cooperation (CTA).
TI  - Agricultural intensification and environment in tropical areas / 
PY  - 1991///
CY  - Leiden: 
PB  - Technical Centre for Agricultural and Rural Co-operation 
KW  - Agricultural intensification
KW  - Congresses
KW  - Environmental protection
ER  -