Heywood, Ian <br/><br/>
An introduction to geographical information systems / 
Ian Heywood, Sarah Cornelius, Steve Carver 
 - 3rd ed. 
 - Essex, England :  Pearson Education Limited,  2006 
 - xxxiii, 426 p. :  col ill. ;  27 cm. 
<br/><br/><label>ISBN: </label>0131293176 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems