DUCKSON . W <br/><br/>
Exercises in physical Geography 

 - 3rd ed 
 - New york  WCB, Mc graw Hill  1976 
 - v, 170p. 
<br/><br/><label>ISBN: </label>0-697-38493-4 
<br/><br/><label>Dewey Class. No.: </label>910.02