Heywood,I. <br/><br/>
An introduction to geographical information systems, 
Ian Heywood; Sarah Cornelius and Steve Carver 
 - 4th 
 - England:  Pearson education,  2011. 
 - xxxiv, 446p.:  ill.;  27 cm. 
<br/><br/> includes bibliographical reference, Glossary and index 
<br/><br/><label>ISBN: </label>9780273722595 
<br/><br/><label>Subjects--Topical Terms: </label><br/>geographic information systems
<br/><br/><label>LC Class. No.: </label>DUCE G70.212.H49