Introduction to geography/ 
Getis ,Arthur.  
 - 9th ed. 
 - NewYork:    McGraw hill,  2004.  
<br/><br/> Includes index.  
<br/><br/><label>ISBN: </label>007291985x  
<br/><br/><label>LC Class. No.: </label>G 128 .G495 2004