Gabler, Robert E. <br/><br/>
Essentials of physical geography / 
Robert E. Gabler, Robert J. Sager and Daniel L. Wise. 
 - 4th ed. 
 - Philadelphia :  Saunders,  1991 
 - xvi, 569 p. :  ill. ;  26 cm. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0030353041 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical geography.