Columbia subject headings:
Africa, North--Politics and government.
Africa, North--Relations--Africa, Sub-Saharan.
Africa, Sub-Saharan--Politics and government.
Africa, Sub-Saharan--Relations--Africa, North.
Harvard subject headings:
Africa, North--Politics and government.
Africa, North--Relations--Africa, Sub-Saharan.
Africa, Sub-Saharan--Politics and government.
Africa, Sub-Saharan--Relations--Africa, North.
Princeton subject headings:
Africa, North--Politics and government.
Africa, North--Relations--Africa, Sub-Saharan.
Africa, Sub-Saharan--Politics and government.
Africa, Sub-Saharan--Relations--Africa, North.