Columbia subject headings:
Harvard subject headings:
Bulgaria--Antiquities.
Bulgaria--Religion.
Cults--Moesia Inferior.
Cults--Moesia.
Cults--Thrace.
Moesia Inferior--Antiquities.
Moesia--Religion.
Thrace--Antiquities.
Thrace--Religion.
Thracians--Religion.
Princeton subject headings:
Cults--Bulgaria--Moesia (Rome).
Cults--Thrace.
Moesia (Rome)--Religion.
Thrace--Religion.