Columbia subject headings:
Harvard subject headings:
Europe--Civilization--Philosophy.
European Union
European Union countries--Economic conditions
European Union countries--Politics and government
European Union countries--Social conditions.
Princeton subject headings:
Europe--Civilization.
Europe--Forecastiing.
Europe--History--21st century.
Europe--Miscellanea.
Europe--Social conditions--21st century.
European Union.
Trivia and miscellanea.