TY  - RPRT
TI  - Circular of the Bureau of Standards no. 13 6th edition: standard specifications for incandescent electric lamps
PY  - 1914
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 13e6
DO  - 10.6028/NBS.CIRC.13e6
ER  -