Columbia subject headings:
Christianity and other religions--Islam--Congresses.
Europe--Ethnic relations--Congresses.
Islam--Relations--Christianity--Congresses.
Turks--Europe--History--20th century--Congresses.
Harvard subject headings:
Christianity and other religions--Islam--Congresses
Islam--Relations--Christianity--Congresses
Multiculturalism--Germany--Religious aspects--Congresses.
Turks--Europe--Congresses.
Princeton subject headings:
Christianity--Relations--Islam--Congresses.
Islam--Relations--Christianity--Congresses.
Multiculturalism--Religious aspects--Germany--Congresses.
Turks--Europe--Congresses.