Khurana, KJS  <br/><br/>
Maths 30 days wonder 

 - 3rd edition.  
 - New Delhi :  S. Chand publication,  2022. 
 - 624 
<br/><br/><label>ISBN: </label>9789352837557 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>515.9  / KHU