TY  - BOOK
AU  - Barrows, William E.
TI  - LIGHT, PHOTOMETRY AND ILLUMINATING ENGINEERING
U1  - 621.32 
PY  - 1951///
CY  - N. Y.
PB  - Mcgraw-Hill
KW  - Light
KW  - Photometry
KW  - Electric Lighting
ER  -