Koay, Mary,  <br/><br/>
Learn about light 

 - 22 pages :   colour illustrations ;   26 cm 
 - Let's learn basic science .
 - Let's learn basic science .
<br/><br/><label>ISBN: </label>9832673267 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Dewey Class. No.: </label>500