Romping in Numberland 
By P.K. Srinivasan 
 - 1st ed./ rep. 
 - New delhi:  National book trust,  2004. 
 - ix,54p. 
<br/><br/><label>ISBN: </label>81-237-3648-7 
<br/><br/><label>Subjects--Index Terms: </label>Mathematics Romping in Numberland 
<br/><br/><label>Dewey Class. No.: </label>510