National electrical safety code. Grounding rules and parts I, II, III, IV, and V. - United States. National Bureau of Standards; American Standards Association (Washington, U. S. Govt. Print. Off., 1948)
Each part also paged separately, and also issued separately as National Bureau of Standards handbooks H 31 to H 35, inclusive.
"Supersedes H 3."
Mode of access: Internet.
Keywords: Accidents -- Prevention; Electrical engineering -- Safety measures