Ballabh, R. <br/><br/>
Co- ordinate geometry.- 2nd ed. 
R. Ballabh 
 - 2 
 - New Delhi  Malhotra Brothers 
 - 352p. 
<br/><br/><label>Subjects--Index Terms: </label>Geometry 
<br/><br/><label>Universal Decimal Class. No.: </label>514.112  / BAL