Heywood, Ian <br/><br/>
An introduction to geographical information systems / 
Cornelius, Sara and Carver, Steve 
 - New York :  Longman,  1998 
 - xiii, 279p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0582089409 
<br/><br/><label>LC Class. No.: </label>G70.2   / .H39 1998