Heywood Ian <br/><br/>
An  introduction to geographical information systems/ 
Heywood Ian.... 
 - 3rd ed. 
 - London:  Pearson,  2006. 
 - xxxiii426 p.;  ill.: 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISSN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Systems
<br/><br/><label>LC Class. No.: </label>G70.212.H49 2006