Heywood, D. Ian <br/><br/>
An introduction to geographical information systems 
Ian, Heywood, Sarah Cornelius, Steve Carver 
 - Harlow, England; New York  Pearson Prentice Hall  2006 
 - xxxiii, 426p.  col. ill.  27cm. 
<br/><br/>includes bibliograpical references and index 
<br/><br/><label>ISBN: </label>0131293176 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems