Columbia subject headings:
Africa, North--Boundaries--History.
Africa, North--Geography.
Africa, North--Politics and government.
Harvard subject headings:
Africa, North--Boundaries--History.
Africa, North--Geography.
Africa, North--Politics and government.
Princeton subject headings:
Africa, North--Boundaries.
Africa, North--Colonization.
Africa, North--Politics and government.
Scientific expeditions--Africa, North--History.