Columbia subject headings:
Harvard subject headings:
Europe--Antiquities--Congresses.
Fossil hominids--Congresses
Fossil hominids--Europe--Congresses.
Paleolithic period, Lower--Congresses.
Paleolithic period, Lower--Europe--Congresses.
Princeton subject headings:
Antiquities, Prehistoric--Congresses.
Antiquities, Prehistoric--Europe--Congresses.
Paleolithic period, Lower--Congresses.
Paleolithic period, Lower--Europe--Congresses.