An introduction to Geographical Information systems 
Ian Heywood ...[etal] 
 - 2nd 
 - New Delhi  Orling Kindersley (India)  2006 
 - xv, 287 
<br/><br/> Includes Index 
<br/><br/><label>ISBN: </label>8177587846 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography-Computer assited instruction<br/>Geography-Information services
<br/><br/><label>Dewey Class. No.: </label>910.285  / WOO P6