Bernhardsen, Tor & Norway, Arendal <br/><br/>
Geographic information systems an introduction 

 - 3rd ed 
 - John wiley & sons inc., New delhi  2002 
 - xiii,428 
<br/><br/><label>ISBN: </label>978-81-265-1138-9 
<br/><br/><label>Dewey Class. No.: </label>910.285 Ber