Ram Ballabh Dr. <br/><br/>
Text Book of Co-ordinate Geometry  Text Book of Co-ordinate Geometry, Lucknow : Prakashan Kendra, 1961 
Ram Ballabh Dr. 
 - Lucknow  Prakashan Kendra  1961 
<br/><br/><label>Dewey Class. No.: </label>516.5