Columbia subject headings:
Ireland--Civilization--19th century.
Ireland--Civilization--20th century.
Harvard subject headings:
Ireland--Civilization--19th century.
Ireland--Civilization--20th century.
Ireland--Civilization--History--19th century.
Ireland--Civilization--History--20th century.
Princeton subject headings:
Ireland--Civilization--19th century.
Ireland--Civilization--20th century.