Das, Ratan <br/><br/>
Textbook of mathematics for classes XI - XII Book V 

 - New Delhi  NCERT  1980 
 - VIII,156p. 
<br/><br/><label>ISBN: </label> RS 5.40 
<br/><br/><label>Source: </label> RS 5.40 
<br/><br/><label>Dewey Class. No.: </label>510 TEX