Narula,Ravi <br/><br/>
Brain teasers/by Ravi Narula 

 - Ahmedabad  Jaico publishing house  2016 
 - 216p. 
<br/><br/><label>ISBN: </label>8172240317 
<br/><br/><label>Dewey Class. No.: </label>793.73  N169B