TY  - BOOK
AU  - Ruthenberg, Hans
TI  - Farming Systems in the Tropics
SN  - 0198534585
U1  - 630.913 
PY  - 1976///
CY  - Oxford
PB  - Clarendon Press
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Agriculture
KW  - Tropics
ER  -