Dryland agriculture in winter precipitation regions of the world 

 - Corvallis, Ore. :  The University,  1979 
 - 218 p.  : ilus. 
<br/><br/> Fotocopia 
<br/><br/><label>LCCN: </label>35299 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Regiones áridas.<br/>Lluvia--Efecto en agricultura.
<br/><br/><label>Dewey Class. No.: </label>634.907  / O7