Heywood, Ian. <br/><br/>
An introduction to geographical information systems / 
 Geographical information systems 
Ian Heywood, Sarah Cornelius, and Steve Carver. 
 - 2nd ed. 
 - Harlow, England ;  New York :  Prentice Hall,  2002. 
 - xv, 295 p. 
<br/><br/><label>ISBN: </label>0130611980 (pbk.) 9780130611987 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.
<br/><br/><label>Dewey Class. No.: </label>910.285  / HEY-I