TY  - BOOK
AU  - Khurana AK
TI  - Theory and Practice of optics and Refraction 
SN  - 9788131231050
U1  - 617.7 3rd ed.
PY  - 2014///
CY  - New Dehli
PB  - Elsevier
KW  - Optics and Refraction
N1  - Include Index
ER  -