Columbia subject headings:
Harvard subject headings:
Nigeria--Economic conditions--1960-
Nigeria--Politics and government--1960-1975.
Nigeria--Politics and government--1975-1979.
Nigeria--Politics and government--To 1960.
Nigeria--Social conditions--1960-
Princeton subject headings:
Nigeria--Economic conditions--1960-
Nigeria--Politics and government--1960-1975.
Nigeria--Politics and government--1975-1979.
Nigeria--Politics and government--To 1960.
Nigeria--Social conditions--1960-