TY  - BOOK
AU  - Sears,Francis Weston
TI  - Optics
T2  - Principles of physics series
AV  - QC355 .S45
U1  - 535 
PY  - 1949///
CY  - Cambridge, Mass.
PB  - Addison-Wesley
KW  - Optics
N1  - First-third editions published, 1946-1948, as v. 3 of the author's Principles of physics
ER  -