Columbia subject headings:
Harvard subject headings:
Europe--Antiquities--Congresses.
Excavations (Archaeology)--Europe--Congresses
Flint industry--Europe--Congresses.
Mineral industries, Prehistoric--Europe--Congresses.
Neolithic period--Europe--Congresses.
Princeton subject headings:
Europe--Antiquities--Congresses.
Flint industry--Europe--Congresses.
Mineral industries, Prehistoric--Europe--Congresses.
Neolithic period--Europe--Congresses.