Hopfen H.J <br/><br/>
Farm Implements for arid and tropical regions/ 
H.J Hopfen. 
 - Rome:  Food and Agriculture Organization,  1969. 
 - xii, 160p.:  ill, diagrams;  23cm. 
<br/><br/><label>ISBN: </label>9251015279 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>LC Class. No.: </label>S 676