Columbia subject headings:
Balkan Peninsula--Ethnic relations.
Balkan Peninsula--History--Religious aspects.
Balkan Peninsula--History.
Nationalism--Balkan Peninsula--History.
Religion and politics--Balkan Peninsula.
Harvard subject headings:
Balkan Peninsula--History, Military.
Balkan Peninsula--Religion.
Ethnicity--Balkan Peninsula.
Nationalism--Balkan Peninsula--Religious aspects.
Princeton subject headings: