TY  - GEN
AU  - Hopfen, H. J.
TI  - Farm implements for arid and tropical regions
U1  - 631.3  
PY  - 1969///
CY  - Rome : 
PB  - Food and agriculture organisation
KW  - Agricultural implements - tropics
KW  - Agricultural implements - arid regions
N1  - Includes bibliographical notes
ER  -