Columbia subject headings:
Africa, Sub-Saharan--Economic conditions--1960---Congresses.
Africa, Sub-Saharan--Social conditions--1960---Congresses.
Harvard subject headings:
Africa, Sub-Saharan--Economic conditions--1960---Congresses.
Africa, Sub-Saharan--Foreign economic relations--Congresses.
Africa, Sub-Saharan--Social conditions--1960---Congresses.
Economic development projects--Africa, Sub-Saharan--Congresses.
Princeton subject headings:
Africa, Sub-Saharan--Economic conditions.