Munch, Theodore W. <br/><br/>
What Is light / 
T.E. Munch;  Illustrated by G. Orloff. 
 - Chicago :  Benefic Press,  1962. 
 - 47 p. :  ill.;  21 cm. 
 - The What is it series .
 - The What is it series .
<br/><br/><label>Subjects--Topical Terms: </label><br/> Natural science