Columbia subject headings:
Africa, Sub-Saharan--Economic conditions--1960---Congresses.
Time perception--Africa, Sub-Saharan--Congresses.
Harvard subject headings:
Africa, Sub-Saharan--Economic conditions--1960---Congresses.
Time perception--Africa, Sub-Saharan--Congresses.
Princeton subject headings:
Africa, Sub-Saharan--Politics and government--Congresses.
Economic development--Social aspects--Africa, Sub-Saharan--Congresses.
Philosophy, African--Congresses.
Time--Philosophy--Congresses.