Columbia subject headings:
Europe--Antiquities.
Flint--Europe.
Mines and mineral resources, Prehistoric--Europe.
Neolithic period--Europe.
Harvard subject headings:
Europe--Antiquities.
Flint--Europe.
Mines and mineral resources--Europe.
Neolithic period--Europe.
Princeton subject headings:
Europe--Antiquities.
Flint--Europe.
Mines and mineral resources, Prehistoric--Europe.
Neolithic period--Europe.