Columbia subject headings:
Eastern question (Balkan)
Thrace--History.
Thrace--Politics and government.
World War, 1914-1918--Territorial questions--Thrace.
Harvard subject headings:
Eastern question (Balkan)
Thrace--History.
Thrace--Politics and government.
World War, 1914-1918--Territorial questions--Thrace.
Princeton subject headings: