Columbia subject headings:
Africa--Foreign relations--1960-
Africa--Politics and government--1960-
Nigeria--Foreign relations--1960-
Nigeria--Politics and government--1960-
Harvard subject headings:
Africa--Foreign relations--1960-
Africa--Politics and government--1960-
Nigeria--Foreign relations--1960-
Nigeria--Politics and government--1960-
Princeton subject headings:
Africa--Foreign relations--1960-
Africa--Politics and government--1960-
Nigeria--Foreign relations--1960-
Nigeria--Politics and government--1960-