TY  - BOOK
AU  - Khanna,D R
AU  - Gulati, H R 
TI  - Fundamental of optics : : Geometrical and physical 
U1  - 535 23
PY  - 1971///
CY  - Delhi
PB  - R. Chand, 
KW  - Optics
N1  - Includes index
ER  -