Columbia subject headings:
Harvard subject headings:
Civilization, Modern--20th century
Civilization, Modern--21st century
European Union countries--Social life and customs--20th century.
European Union countries--Social life and customs--21st century.
Princeton subject headings:
Civilization, Modern--20th century.
Civilization, Modern--21st century.
Essays.
European Union countries--Social life and customs--20th century.
European Union countries--Social life and customs--21st century.