Tannenbaum, Beulah <br/><br/>
Understanding light / 
by Beulah Tannenbaum and Myra Stillman ; illustrated by Gustav Schrotter 
 - London :  Blackie,  1963 
 - 140 p. :  ill. ;  20 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Light--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>535