TY  - BOOK
AU  - LONGHURST, R . S .
TI  - GEOMETRICAL AND PHYSICAL OPTICS / 
U1  - 535.2 
PY  - 1973/// (1976 RPT )
CY  - HYDERABAD
PB  - ORIENT LONGMAN
KW  - OPTICS - GEOMETRICAL
KW  - OPTICS - PHYSICAL
ER  -