TY  - RPRT
TI  - 1928 supplement to Circular of the Bureau of Standards, no. 13: 1928 supplement to United States government master specification for lamps, electric, incandescent, large, tungsten filament
PY  - 1927
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 13e11sup1928
DO  - 10.6028/NBS.CIRC.13e11sup1928
ER  -