Columbia subject headings:
Harvard subject headings:
Bulgaria--Antiquities.
Cemeteries--Bulgaria.
Cemeteries--Danube River Valley.
Cemeteries--Romania
Danube River Valley--Antiquities.
Excavations (Archaeology)--Bulgaria
Excavations (Archaeology)--Danube River Valley.
Excavations (Archaeology)--Romania
Romania--Antiquities.
Princeton subject headings:
Bulgaria--Antiquities.
Cemeteries--Bulgaria.
Cemeteries--Danube River Valley.
Cemeteries--Romania.
Danube River Valley--Antiquities.
Excavations (Archaeology)--Bulgaria.
Excavations (Archaeology)--Danube River Valley.
Excavations (Archaeology)--Romania.
Romania--Antiquities.