Bernhardsen, Tor. , <br/><br/>
Geographic information systems :  an introduction / 
Tor Bernhardsen. 
 - 3rd ed. 
 - xiii, 428 pages :  illustrations ;  24 cm. 
<br/><br/><label>ISBN: </label>0471419680 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.
<br/><br/><label>LC Class. No.: </label>G70.212   / .B47 2002