Goel, Ajay and Geol , Alka Tr. <br/><br/>
Taxmann's Mathematics 

 - New Delhi  Taxmann Allied service pvt. Ltd.  2000 
 - 1041p. 
<br/><br/><label>ISBN: </label>81-7496-255-7 
<br/><br/><label>Dewey Class. No.: </label>519.5       Goe. P