Columbia subject headings:
Energy consumption--Statistics--Periodicals.
Energy development--Statistics--Periodicals.
Energy industries--Statistics--Periodicals.
Power resources--Statistics--Periodicals.
Harvard subject headings:
Energy consumption--Statistics--Periodicals.
Energy development--Statistics--Periodicals.
Energy industries--Statistics--Periodicals
Power resources--Statistics--Periodicals
Princeton subject headings:
Energy consumption--Statistics--Periodicals.
Energy development--Statistics--Periodicals.
Energy industries--Statistics--Periodicals.
Periodicals.
Power resources--Statistics--Periodicals.
Statistics.