TY  - BOOK
AU  - Rao, B. V. N.
TI  - Textbook of light: Geometrical optics
U1  - 535 
PY  - 1967///
CY  - New Delhi
PB  - S. S.
KW  - Light
KW  - Optics
KW  - Photometry
N1  - Includes index
ER  -