TY  - BOOK
AU  - Tannenbaum,Beulah
AU  - Stillman,Myra
AU  - Schrotter Gustav,
TI  - Understanding light
U1  - 535 
PY  - 1963///
CY  - London
PB  - Blackie
KW  - Light
KW  - Juvenile literature
N1  - Includes index
ER  -