Columbia subject headings:
Africa--Economic conditions--1960---Congresses.
Africa--Economic policy--Congresses.
Economic assistance--Africa--Congresses.
International cooperation--Congresses.
Harvard subject headings:
Africa--Economic conditions--1960---Congresses.
Economic assistance--Africa--Congresses
International cooperation--Congresses
Princeton subject headings:
Africa--Economic conditions--1960---Congresses.
Africa--Economic policy--Congresses.
Economic assistance--Africa--Congresses.
International cooperation--Congresses.