Columbia subject headings:
Communist strategy.
Europe--Foreign relations--Soviet Union.
International labor activities--Political aspects--Europe.
Labor unions and international relations--Soviet Union.
National security--Soviet Union.
Soviet Union--Foreign relations--Europe.
Harvard subject headings:
Communist strategy.
Europe--Foreign relations--Soviet Union.
International labor activities--Political aspects--Europe.
Labor unions and international relations--Soviet Union.
National security--Soviet Union
Soviet Union--Foreign relations--Europe.
Princeton subject headings:
Communist strategy.
Europe--Foreign relations--Soviet Union.
International labor activities--Political aspects--Europe.
Labor unions and international relations--Soviet Union.
National security--Soviet Union.
Soviet Union--Foreign relations--Europe.