Columbia subject headings:
Northern Ireland--Foreign relations--United States.
Northern Ireland--Politics and government--1968-1998.
United States--Foreign relations--Northern Ireland.
Harvard subject headings:
Northern Ireland--Politics and government--1968-1998
Princeton subject headings:
Northern Ireland--Politics and government--1968-1998.
Northern Ireland--Politics and government--1998-
Peace-building--Northern Ireland--History--20th century.
World politics.