Columbia subject headings:
Africa, Northeast--Antiquities--Congresses.
Africa, Northeast--Civilization--Congresses.
Africa, Northeast--History--Congresses.
Harvard subject headings:
Africa, Northeast--Antiquities--Congresses.
Africa, Northeast--Civilization--Congresses.
Africa, Northeast--History--Congresses.
Princeton subject headings:
Africa, Northeast--Antiquities--Congresses.
Africa, Northeast--Civilization--Congresses.
Africa, Northeast--History--Congresses.