Columbia subject headings:
Africa--Commerce--History--Congresses.
Business enterprises--Africa--History--Congresses.
Businessmen--Africa--History--Congresses.
Merchants--Africa--History--Congresses.
Harvard subject headings:
Africa--Commerce--History--Congresses.
Business enterprises--Africa--History--Congresses.
Businessmen--Africa--History--Congresses.
Merchants--Africa--History--Congresses.
Princeton subject headings:
Africa--Commerce--Congresses.
Africa--Economic conditions--Congresses.
Business enterprises--Africa--Congresses.
Entrepreneurship--Congresses.