Columbia subject headings:
Bulgaria--Antiquities.
Fibulas (Jewelry)--Bulgaria.
Iron age--Bulgaria.
Thracians--Bulgaria.
Harvard subject headings:
Bulgaria--Antiquities.
Fibulas (Jewelry)--Bulgaria.
Iron age--Bulgaria.
Thracians--Bulgaria.
Princeton subject headings:
Bulgaria--Antiquities.
Fibulas (Jewelry)--Bulgaria.
Iron age--Bulgaria.
Thracians--Bulgaria.