Thornes, John <br/><br/>
River channels 
John Thornes 
 - London  Macmillan Education  1979 
 - 46 p. ; 22 cm. 
 - Aspects of geography .
<br/><br/><label>ISBN: </label>0333242432 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Watersheds