Khurana K R S <br/><br/>
Maths 30 Days wonder 

 - NewDelhi  Sultan Chand & Sons Pvt. Ltd.  2010 
 - 605 p. 
<br/><br/><label>ISBN: </label> 280 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510 KHU