TY  - BOOK
AU  - Clay, 
TI  - Practical Exercise in Light
U1  - 535 
PY  - 1900///
CY  - Kottayam
PB  - NATIONAL BOOKSTALL
KW  - General Stack
KW  - Light
KW  - Light & infrared & ultraviolet phenomenaPhysics
KW  - Physics
ER  -