Essentials of physical geography / 
Robert E. Gabler ... [et al.]. 
 - 2nd ed. 
 - Philadelphia :  Saunders College Pub.,  c1982. 
 - vii, 568 p., [32] p. of plates :  ill. (some col.) ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0030585511 
<br/><br/><label>LCCN: </label>81053083  
<br/><br/><label>LC Class. No.: </label>GB54.5 .E84 1982  / .E84 1982 
<br/><br/><label>Dewey Class. No.: </label>551