Walton, K. <br/><br/>
The arid zones 

 - London :  Hutchinson University,  1969 
 - 175 p.  : ilus. 
<br/><br/><label>LCCN: </label>51215 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Regiones áridas.
<br/><br/><label>Dewey Class. No.: </label>631.0915  / W3