Columbia subject headings:
Nigeria--Economic conditions--1970-
Nigeria--Economic policy.
Nigeria--Social conditions--1960-
Nigeria--Social policy.
Harvard subject headings:
Nigeria--Economic conditions--1970-
Nigeria--Economic policy.
Nigeria--Social conditions--1960-
Nigeria--Social policy.
Princeton subject headings:
Nigeria--Economic conditions--1970-
Nigeria--Economic policy.
Nigeria--Social conditions--1960-
Nigeria--Social policy.