Thiibanvidhaa Sattopaathyaai. <br/><br/>
Oli : Saarbu Sodhanaikal Seivomaa! / Thiibanvidhaa Sattopaathyaai. ; translated by Bala. 

 - Chennai :  Paavai Pub,  2007 
 - p.44 : 
<br/><br/><label>ISBN: </label>8177353330 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>On light and some experiments related to light; for children.-------
<br/><br/><label>Dewey Class. No.: </label>535.078  / Li