Strahler, Arthur Newell,  1918- <br/><br/>
Elements of physical geography / 
Arthur N. Strahler, Alan H. Strahler 
 - 4th ed. 
 - Wiley : New York  1989 
 - 562 p. :  ill. ;  26 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0471616478 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical geography