Columbia subject headings:
Nigeria--Economic conditions--1970-
Nigeria--Economic policy.
Nigeria--Politics and government--1979-1983.
Harvard subject headings:
Nigeria--Economic conditions--1970-
Nigeria--Economic policy.
Nigeria--Politics and government--1979-1983.
Nigeria--Politics and government--1984-1993.
Princeton subject headings:
Nigeria--Economic conditions--1970-
Nigeria--Economic policy.
Nigeria--Politics and government--1979- .