Columbia subject headings:
Energy policy--Europe.
Energy policy--Soviet Union.
Europe--Commerce--Soviet Union.
Europe--Foreign economic relations--Soviet Union.
Soviet Union--Commerce--Europe.
Soviet Union--Foreign economic relations--Europe.
Harvard subject headings:
Energy policy--Europe
Energy policy--Soviet Union
Europe--Commerce--Soviet Union.
Europe--Foreign economic relations--Soviet Union.
Soviet Union--Commerce--Europe.
Soviet Union--Foreign economic relations--Europe.
Princeton subject headings:
Energy policy--Europe.
Energy policy--Soviet Union.
Europe--Commerce--Soviet Union.
Europe--Foreign economic relations--Soviet Union.
Soviet Union--Commerce--Europe.
Soviet Union--Foreign economic relations--Europe.