Arora , P.N  and Bagga P. C <br/><br/>
Cordinate geometry 

 - New Delhi  Pitambar Publishing company  1994 
 - 244 P. 
<br/><br/><label>ISBN: </label>81-209-0206-8 
<br/><br/><label>Dewey Class. No.: </label>516.16    Aro.N4