TY  - BOOK
AU  - Tannenbaum, Beulah
AU  - Stillmany, Myra
TI  - Understanding light
PY  - 1968///
CY  - New York : 
PB  - Fawcett Publications, 
KW  - OPTICA
KW  - LUZ
N1  - This edition is for readers for whom English is a second language. It can be anyone whos has learned 2,000 words of english
ER  -