Columbia subject headings:
Harvard subject headings:
Great Britain--Foreign relations--20th century.
Ireland--Politics and government--1837-1901.
Ireland--Politics and government--20th century.
Princeton subject headings:
Great Britain--Foreign relations--Ireland.
Great Britain--Politics and government--1837-1901.
Great Britain--Politics and government--20th century.
Ireland--Foreign relations--Great Britain.
Ireland--Politics and government--1837-1901.
Ireland--Politics and government--20th century.
Irish question.
Northern Ireland--Politics and government--1968-1998.