TY  - BOOK
AU  - Middleton, L R
TI  - A Textbook of Light
U1  - PL11 
PY  - 1937///
CY  - London
PB  - G Bell And Sons Ltd 
KW  - Physics Light, Heat and Sound
N1  - PL means Physics Light, Heat and Sound Page No. 465-469 in A-Z Accession Register (Accession No. PL1-PL131)
ER  -