TY  - RPRT
TI  - Circular of the Bureau of Standards no. 49: safety rules to be observed in the operation and maintenance of electrical equipment and lines
PY  - 1914
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 49
DO  - 10.6028/NBS.CIRC.49
ER  -