Bhatia, A. S.   <br/><br/>
Speed Maths and Beauty of Numbers  With Problems on Mental Ability and Reasoning 
A. S. Bhatia  
 - New Delhi  Deep & Deep Publications  2006 
 - 170 p. 
<br/><br/><label>ISBN: </label>9788176298124 
<br/><br/><label>Dewey Class. No.: </label>510  / BHA