Columbia subject headings:
Africa--Antiquities--Congresses.
Fossil hominids--Africa--Congresses.
Language and languages--Origin--Congresses.
Prehistoric peoples--Africa--Congresses.
Harvard subject headings:
Africa--Antiquities--Congresses.
Excavations (Archaeology)--Africa--Congresses.
Fossil hominids--Africa--Congresses.
Linguistic paleontology--Africa--Congresses.
Prehistoric peoples--Africa--Congresses.
Princeton subject headings:
Anthropology, Prehistoric--Africa--Congresses.
Prehistoric peoples--Africa--Congresses.
Social evolution--Congresses.