TY  - BOOK
AU  - Ruthenberg,Hans
AU  - MacArthur,J.D.
AU  - Zandstra,H.D.
AU  - Collinson,M.P.
TI  - Farming systems in the tropics
SN  - 0198594828
AV  - S604.37.R87 1980 
U1  - 630/.913 
PY  - 1980///
CY  - Oxford
PB  - Clarendon Press
KW  - Agricultural systems
KW  - Tropics
KW  - Farm management
ER  -