Columbia subject headings:
Electric power distribution--Periodicals.
Electric power production--Periodicals.
Electric power transmission--Periodicals.
Harvard subject headings:
Electric power distribution--Periodicals.
Electric power production--Periodicals.
Electric power transmission--Periodicals.
Princeton subject headings:
Electric power distribution--Periodicals.
Electric power production--Periodicals.
Electric power transmission--Periodicals.
Periodicals.