Columbia subject headings:
Harvard subject headings:
Africa--Economic conditions--1960---Statistics--Periodicals.
Africa--Social conditions--1960---Statistics--Periodicals.
Economic indicators--Africa--Periodicals.
Social indicators--Africa--Periodicals.
Princeton subject headings:
Africa--Economic conditions--1960---Statistics--Periodicals.
Africa--Social conditions--1960---Statistics--Periodicals.
Economic indicators--Africa--Periodicals.
Periodicals.
Social indicators--Africa--Periodicals.
Statistics.