TY  - BOOK
AU  - Simmonds,Norman W.
TI  - Farming systems research: a review 
SN  - 0821305662
AV  - S494.5.S95 S56 1985
U1  - 630/.72�19 
PY  - 1985///
CY  - Washington, D.C.
PB  - World Bank
KW  - Agricultural systems
KW  - Research
KW  - Agriculture
KW  - On-farm
KW  - Tropics
ER  -