TY  - BOOK
AU  - byA. K. Khurana(Author)
TI  - Theory and Practice of Optics & Refraction
SN  - 978-8131249154
U1  - 617.7 
PY  - 2016///
CY  - INDIA
PB  - Elsevier India; 4 edition (2016)
KW  - ENT
ER  -