Columbia subject headings:
Energy industries--Political aspects--Former Soviet republics.
Energy policy--European Union countries.
Energy policy--Former Soviet republics.
Europe--Economic integration.
Natural gas pipelines--Former Soviet republics.
Natural gas--Transportation--Former Soviet republics.
Petroleum industry and trade--Political aspects--Former Soviet republics.
Petroleum pipelines--Former Soviet republics.
Petroleum--Transportation--Former Soviet republics.
Power resources--Former Soviet republics.
Harvard subject headings:
Princeton subject headings:
Energy industries--Political aspects--Former Soviet republics.
Energy policy--European Union countries.
Energy policy--Former Soviet republics.
Europe--Economic integration.
Natural gas pipelines--Former Soviet republics.
Natural gas--Transportation--Former Soviet republics.
Petroleum industry and trade--Political aspects--Former Soviet republics.
Petroleum pipelines--Former Soviet republics.
Petroleum--Transportation--Former Soviet republics.
Power resources--Former Soviet republics.