Columbia subject headings:
Religion and politics--European Union countries--Congresses.
Religion and state--European Union countries--Congresses.
Harvard subject headings:
Balkan Peninsula--Foreign relations--Religious aspects--Congresses.
Balkan Peninsula--Religion--Congresses.
Economic development--Balkan Peninsula--Religious aspects--Congresses.
Social integration--Balkan Peninsula--Religious aspects--Congresses.
Princeton subject headings:
Religion and politics--European Union countries--Congresses.
Religion and state--European Union countries--Congresses.