The problems of the arid zone: proceedings of the Paris symposium. 

 - Paris :  UNESCO,  1962 
 - xii, 481p. :  32cm. 
 - UNESCO arid zone research .
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural economics<br/>Nomads<br/>Water<br/>Economics<br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>338.1  / UNESCO