WALLING (D E)and GREGORY (K J) <br/><br/>
Human activity and environmental processes 

 - Chichester  John Wiley           1987 
 - xiv, 466p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHYSICAL GEOGRAPHY
<br/><br/><label>Dewey Class. No.: </label>U2, M7