Columbia subject headings:
Communism--Italy.
Italy--Foreign relations--Soviet Union.
Partito comunista italiano--Party work.
Soviet Union--Foreign relations--Italy.
Harvard subject headings:
Communism--Italy
Communism--Soviet Union
Italy--Foreign relations--Soviet Union.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za.
Partito comunista italiano
Soviet Union--Foreign relations--Italy.
Princeton subject headings: