Columbia subject headings:
Communism--Europe, Western--History--20th century.
Europe, Western--Politics and government.
Socialism--Europe, Western--History--20th century.
Harvard subject headings:
Communism--Europe, Western--History--20th century.
Communism--Europe--History--20th century
Europe, Western--Politics and government--20th century.
Europe--Politics and government--20th century.
Socialism--Europe, Western--History--20th century.
Socialism--Europe--20th century.
Socialism--Europe--History--20th century
Princeton subject headings: