Ajoy Ghatak. <br/><br/>
Light and its Many Wonders 

 - New Delhi  Viva Books Publishers  2015 
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>978-81-309-3428-0 
<br/><br/><label>Dewey Class. No.: </label>535  / GHA