Khatri , Vikas  <br/><br/>
Science puzzles : 

 - New dilhi :   India ; 
 - 144 p; 21 cm .  01 
 - 2025-01-06 
<br/><br/><label>ISBN: </label>9789383744701 
<br/><br/><label>Nat. Bib. No.: </label>0011005 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>KHA 
<br/><br/><label>Universal Decimal Class. No.: </label>520