50 puzzles for quick thinking 
50 puzzles for quick thinking 
 -  "88 pbk.," 
 - CHENNAI  Emerald Publication  2012 
<br/><br/><label>ISBN: </label>9788179662786 
<br/><br/><label>Dewey Class. No.: </label>793.73 PHI  / 22.793.73 PHI