Dhunta, P. S. <br/><br/>
Principles of GPS 
/ by  P. S. Dhunta 
 - Newdelhi:  Deep,  2001. 
 - 398p. 
<br/><br/><label>ISBN: </label>8185622116 
<br/><br/><label>Dewey Class. No.: </label>621.3825  / DHU/P