TY  - RPRT
TI  - Safety rules for the operation of electric equipment and lines comprising: part 4 of the fifth edition national electrical safety code 
PY  - 1938
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS HB 34
DO  - 10.6028/NBS.HB.34
ER  -