Worboys, Michael. <br/><br/>
GIS :  a computing perspective / 
Michael Worboys, Matt Duckham 
 - 2nd ed. 
 - Boca Raton, Florida. :  CRC,  2004. 
 - 426 p. :  ill., maps ;  26 cm. 
<br/><br/>Includes bibliographical references (p. 391-411) and index. 
<br/><br/><label>ISBN: </label>0415283752 (hbk.)  RM169.44 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.