Wallen, C. C. <br/><br/>
Aridity definitions and their applicability 

<br/><br/> Sobretiro de: Geografiska Annaler. 49A: 367-384, 1967 
<br/><br/><label>LCCN: </label>51603 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Regiones áridas--Clima.