AU  - Barrows,William E.
TI  - Light, Photometry and Illuminating Engineering / 
U1  - 621.32 
PY  - 1938///
CY  - London : 
PB  - McGraw-Hill Book Company, Inc. , 
KW  - Engineering amd applied operatrions
KW  - Applied Physics
KW  - Electromagnetic and related branches of engineering
KW  - Illumination and lighting
ER  -