Columbia subject headings:
Harvard subject headings:
Europe--Relations--Germany--Ruhr (Region)
Europe--Relations--Luxembourg.
Europe--Relations--Turkey--Istanbul.
Istanbul (Turkey)--Relations--Europe.
Luxembourg--Relations--Europe.
Ruhr (Germany : Region)--Relations--Europe.
Princeton subject headings:
Cultural pluralism--Europe--Congresses.
Europe--Civilization--21st century--Congresses.
Europe--Cultural policy--Congresses.
Multiculturalism--Europe--Congresses.