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  -