Columbia subject headings:
Communist parties--Europe.
Europe--Foreign relations--Soviet Union.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za.
Socialist parties--Europe.
Soviet Union--Foreign relations--Europe.
Harvard subject headings:
Princeton subject headings:
Europe--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Europe.