Columbia subject headings:
Energy development--Canada--Congresses.
Energy development--Great Britain--Congresses.
Energy industries--Canada--Congresses.
Energy industries--Great Britain--Congresses.
Energy policy--Canada--Congresses.
Energy policy--Great Britain--Congresses.
Harvard subject headings:
Energy development--Canada--Congresses.
Energy development--Great Britain--Congresses.
Energy industries--Canada--Congresses.
Energy industries--Great Britain--Congresses.
Energy policy--Canada--Congresses.
Energy policy--Great Britain--Congresses.
Princeton subject headings: