TY  - RPRT
TI  - Interlaboratory intercomparisons of 500-watt tungsten-filament standards of luminous flux 
AU  - Burns, Velma I
PY  - 1958
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 6158
DO  - 10.6028/NBS.RPT.6158
ER  -