TY  - RPRT
TI  - Luminosity filter and thermopile for a physical photometer 
AU  - Teele, Ray P
AU  - Belknap, Marion A
PY  - 1954
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS report ; 3077
DO  - 10.6028/NBS.RPT.3077
ER  -