TY  - BOOK
AU  - Hopfen, H.J.
TI  - Farm implements for arid and tropical regions
T2  - FAO Agricultural Development Papers; no.91
U1  - 631.311(252+213) K2 
PY  - 1969///
CY  - Rome
PB  - Food and Agriculture Organisation of the United Nations
KW  - H.J. Hopfen
KW  - Farm equipment,Arid regions,Tropics-conditions
ER  -