Columbia subject headings:
Harvard subject headings:
Electric utilities--Congresses.
Energy industries--Congresses
Force and energy--Congresses.
Nuclear energy--Congresses
Power electronics--Congresses.
Power resources--Economic aspects--Congresses.
Power resources--Political aspects--Congresses.
Power resources--Social aspects--Congresses.
Renewable energy sources--Congresses
Solar energy--Congresses
Wind power--Congresses
Princeton subject headings:
Electric utilities--Congresses.
Power resources--Economic aspects--Congresses.
Power resources--Political aspects--Congresses.
Power resources--Social aspects--Congresses.
Renewable energy sources--Congresses.
Solar energy--Congresses.
Wind power--Congresses.