TY  - BOOK
AU  - Houstoun , R . A
TI  - Vision And Colour Vision
U1  - PL78 
PY  - 1932///
CY  - London
PB  - Longmans Green And Co
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  -