Davis, Bruce E. <br/><br/>
GIS :  a visual approach / 
Bruce E. Davis. 
 - 2nd ed. 
 - Albany, N.Y. :  Onword Press/Thomson Learning,  2001. 
 - x, 438 p. :  ill., maps ;  24 cm. 
<br/><br/><label>ISBN: </label>076682764X (pbk.)  RM196.78 
<br/><br/><label>LCCN: </label>00-052290 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.