TY  - BOOK
AU  - Sears, Francis W.,
TI  - Optics
T2  - Principles of physics series
U1  - 535 
PY  - 1949///
CY  - Reading, Massachusetts
PB  - Addison-Wesley
KW  - OPTICA
KW  - LUZ
KW  - FOTOMETRIA
ER  -