Columbia subject headings:
Nigeria--Armed Forces--Political activity--Congresses.
Nigeria--Congresses.
Nigeria--Economic conditions--1970---Congresses.
Nigeria--Economic policy--Congresses.
Nigeria--Politics and government--1984-1993--Congresses.
Nigeria--Social conditions--1960---Congresses.
Harvard subject headings:
Nigeria--Politics and government--1984-1993--Congresses.
Nigeria--Politics and government--1993-2007--Congresses.
Princeton subject headings: