TY  - RPRT
TI  - Circular of the Bureau of Standards no. 60 2nd edition: electric units and standards
PY  - 1920
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 60e2
DO  - 10.6028/NBS.CIRC.60e2
ER  -