Columbia subject headings:
Africa--Economic policy.
Africa--Politics and government.
Africa--Research--Poland.
Africa--Social conditions.
Civilization, Modern.
Harvard subject headings:
Africa--Economic policy.
Africa--Politics and government.
Africa--Research--Poland.
Africa--Social conditions.
Civilization, Modern.
Princeton subject headings:
Africa--Economic policy.
Africa--Politics and government.
Africa--Social conditions.
Civilization, Modern.