Columbia subject headings:
Harvard subject headings:
Balkan Peninsula--Antiquities--Congresses.
Danube River Valley--Antiquities--Congresses.
Princeton subject headings:
Antiquities, Prehistoric--Balkan Peninsula--Congresses.
Balkan Peninsula--Antiquities, Roman--Congresses.
Balkan Peninsula--Civilization--Congresses.
Bronze age--Balkan Peninsula--Congresses.
Excavations (Archaeology)--Balkan Peninsula--Congresses.
Neolithic period--Balkan Peninsula--Congresses.