Columbia subject headings:
Africa, Eastern--Antiquities--Congresses.
Africa, North--Antiquities--Congresses.
Prehistoric peoples--Africa, Eastern--Congresses.
Prehistoric peoples--Africa, North--Congresses.
Harvard subject headings:
Africa, Eastern--Antiquities--Congresses.
Africa, North--Antiquities--Congresses.
Prehistoric peoples--Africa, Eastern--Congresses.
Prehistoric peoples--Africa, North--Congresses.
Princeton subject headings: