TY  - RPRT
TI  - Circular of the Bureau of Standards no. 13 7th edition: standard specifications for incandescent electric lamps
PY  - 1915
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 13e7
DO  - 10.6028/NBS.CIRC.13e7
ER  -