TY  - BOOK
AU  - D R Khanna and others
AU  - KHANNA  (D R)
AU  - GULATI (H R)
TI  - Fundamentals of Optics
U1  - 531/172 23
PY  - 1974///
CY  - Delhi
PB  - R Chand and Co
KW  - Optics
ER  -