Columbia subject headings:
Harvard subject headings:
Ireland--Politics and government--19th century.
Northern Ireland--History--1968-1998.
Northern Ireland--Politics and government.
Social conflict--Ulster (Northern Ireland and Ireland)
Ulster (Northern Ireland and Ireland)--History.
Ulster (Northern Ireland and Ireland)--Politics and government.
Princeton subject headings:
Northern Ireland--History--1968-1998.
Social conflict--Ulster (Northern Ireland and Ireland).
Ulster (Northern Ireland and Ireland)--History.