Columbia subject headings:
Harvard subject headings:
Energy conservation--Congresses
Energy policy--Congresses
Energy policy--Russia (Federation)--Moscow--Congresses.
Petroleum conservation--Government policy--Congresses.
Petroleum industry and trade--Government policy--Congresses.
Petroleum industry and trade--Management--Congresses.
Petroleum industry and trade--Russia (Federation)--Moscow--Management--Congresses.
Petroleum--Taxation--Congresses.
Princeton subject headings:
Petroleum conservation--Government policy--Congresses.
Petroleum industry and trade--Government policy--Congresses.
Petroleum--Taxation--Congresses.