The problems of the arid zone  : proceedings of the Paris Symposium 

 - Paris :  UNESCO,  1962 
 - 481 p.  : ilus. 
 - Arid zone research  ; 18 .
 - Arid zone research  ; 18 .
<br/><br/><label>LCCN: </label>45975 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hombre--Influencia del medio ambiente.<br/>Regiones áridas.
<br/><br/><label>Dewey Class. No.: </label>551.5943  / U54pY