Columbia subject headings:
Constitutional law--Northern Ireland.
European Union--Great Britain.
Great Britain. Treaties, etc. 1998 April 10.
Ireland--Foreign relations--Northern Ireland.
Ireland--Politics and government--1949-
Northern Ireland--Foreign relations--Ireland.
Northern Ireland--Politics and government--1998-
Harvard subject headings:
Ireland--Politics and government--1949-
Northern Ireland--Politics and government--1998-
Princeton subject headings:
Ireland--Politics and government--1949-
Northern Ireland--Politics and government--1998-