Columbia subject headings:
Harvard subject headings:
Europe--Social conditions--20th century.
European Economic Community.
Internationalism--History--20th century.
Marginality, Social--Europe--History--20th century.
Princeton subject headings:
Europe--Politics and government--20th century.
Europe--Social conditions--20th century.
European federation.
Internationalism--History--20th century.
Marginality, Social--Europe--History--20th century.