TY  - BOOK
AU  - Subrahmanyam, N.
AU  - Lal, Brij
TI  - Textbook of optics (a)
SN  - 9788121904674
U1  - 535 
KW  - FIRST ORDER THEORY
KW  - OPTICAL INSTRUMENT
KW  - REFLECTON'S TELESCOPE
KW  - SPECTROMETER
KW  - PHOTOMETRY
ER  -