Tannenbaum, Beulah <br/><br/>
Understanding light  : 

 - New York :   Fawcett Publications,   1968. 
 - 117 páginas :   il., lám., fot. 
 - Ladder : 2000 words ;   L-54 .
<br/><br/> This edition is for readers for whom English is a second language. It can be anyone whos has learned 2,000 words of english. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>OPTICA<br/>LUZ