Yeung, Albert K W  & LO, C.P <br/><br/>
Concepts and techniques of geographic information systems  

 - 2nd ed . 
 - PHI Learning Private Limited  New Delhi  2007 
 - xii, 532 
<br/><br/>
<br/><br/><br/>E 
<br/><br/><label>Universal Decimal Class. No.: </label>910.285 Lo/Yeu