Columbia subject headings:
Harvard subject headings:
Energy policy--Congresses
International economic relations--Congresses
Petroleum industry and trade--Government policy--Congresses.
Petroleum industry and trade--International cooperation--Congresses.
Petroleum products--Prices--Congresses.
Princeton subject headings:
Energy policy--Congresses.
International economic relations--Congresses.
Petroleum industry and trade--Government policy--Congresses.
Petroleum industry and trade--International cooperation--Congresses.
Petroleum products--Prices--Congresses.