Columbia subject headings:
Thrace--Antiquities.
Thrace--Civilization.
Thrace--History.
Harvard subject headings:
Thrace, Eastern (Turkey)--Antiquities.
Thrace, Eastern (Turkey)--Civilization.
Thrace, Eastern (Turkey)--History, Local.
Thrace, Eastern (Turkey)--History--To 1500.
Princeton subject headings:
Thrace--Antiquities.
Thrace--Civilization.
Thrace--History.