TY  - RPRT
TI  - Bureau circular no. 6 2nd edition: Verification of electrical standards and measuring instruments
PY  - 1906
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 6e2
DO  - 10.6028/NBS.CIRC.6e2
ER  -