Burrough, P. A. <br/><br/>
Principles of geographical information systems / 
Peter A. Burrough and Rachael A. McDonnell. 
 - 3rd ed. 
 - New York :  Oxford University Press,  1998. 
 - viii, 285 p. :  ill. ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9780198748618 (pbk. ) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.