Munch, Theodore W. <br/><br/>
What is light / 
by Theodore W. Munch ; illustrated by Gregory Orloff 
 - London :  Collins,  1959 
 - 48 p. :  ill. ;  21 cm. 
 - The What is it series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Light--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>535.1