TY  - BOOK
AU  - Wallis,J.A.Nicholas
TI  - Intensified systems of farming in the tropics and subtropics
T2  - World Bank discussion paper
SN  - 0821339443
U1  - 630.913 
PY  - 1997///
CY  - Washington, D.C.
PB  - World Bank
KW  - Agricultural systems
KW  - Tropics
KW  - Dry farming
ER  -