Columbia subject headings:
Africa, Southern--Economic integration.
Africa, Southern--Foreign economic relations--South Africa.
South Africa--Foreign economic relations--Africa, Southern.
Harvard subject headings:
Africa, Southern--Economic integration.
Africa, Southern--Foreign economic relations--South Africa.
South Africa--Foreign economic relations--Africa, Southern.
Princeton subject headings:
Africa, Southern--Economic conditions--1975-1994.
Africa, Southern--Foreign economic relations--South Africa.
South Africa--Economic conditions--1961-1991.
South Africa--Foreign economic relations--Africa, Southern.