Columbia subject headings:
Archaeology--Periodicals.
Balkan Peninsula--Antiquities--Periodicals.
Excavations (Archaeology)--Balkan Peninsula--Periodicals.
Harvard subject headings:
Archaeology--Periodicals
Balkan Peninsula--Antiquities--Periodicals.
Excavations (Archaeology)--Balkan Peninsula--Periodicals.
Princeton subject headings:
Archaeology--Periodicals.
Balkan Peninsula--Antiquities--Periodicals.
Bulgaria--Antiquities--Periodicals.
Excavations (Archaeology)--Balkan Peninsula--Periodicals.
Periodicals.