Columbia subject headings:
Africa, West--Boundaries.
Nigeria--Boundaries.
Harvard subject headings:
Africa, West--Boundaries.
Africa, West--Civilization.
Africa, West--Politics and government--1960-
Borderlands--Africa, West.
Borderlands--Nigeria.
Nigeria--Boundaries.
Nigeria--Civilization.
Nigeria--Politics and government--1960-
Princeton subject headings:
Africa, West--Boundaries.
Africa, West--Civilization.
Africa, West--Politics and government--1960-
Nigeria--Boundaries.
Nigeria--Civilization.
Nigeria--Politics and government--1960-