Heywood, Ian , <br/><br/>
An introduction to geographical information systems  Textual Documents 
Ian Heywood, Sarah Cornelius and Steve Carver 
 - Delhi:  Pearson Education ( Singapore ) Pvt. Ltd.,  2003. 
 - xv, 295p.:  24cm. 
<br/><br/><label>ISBN: </label>9788178089829 
<br/><br/><label>Subjects--Index Terms: </label>Geographical information system 
<br/><br/><label>Dewey Class. No.: </label>910.285