Columbia subject headings:
Diplomacy.
Europe, Eastern--Foreign relations--1945-1989.
International law and socialism.
Soviet Union--Foreign relations.
Harvard subject headings:
Diplomacy.
Europe, Eastern--Foreign relations.
International law and socialism.
Soviet Union--Foreign relations.
Princeton subject headings:
Diplomacy.
Europe, Eastern--Foreign relations.
International law and socialism.
Soviet Union--Foreign relations.