Columbia subject headings:
Dikko, Umaru.
Great Britain--Foreign relations--Nigeria.
Nigeria--Foreign relations--Great Britain.
Harvard subject headings:
Dikko, Umaru, 1936-2014--Kidnapping, 1984.
Dikko, Umaru--Kidnapping, 1984.
Great Britain--Foreign relations--Nigeria.
Nigeria--Foreign relations--Great Britain.
Princeton subject headings: