Columbia subject headings:
Harvard subject headings:
Ireland--Civilization--20th century--Congresses.
Ireland--Social life and customs--20th century--Congresses.
Irish literature--20th century--History and criticism--Congresses.
Princeton subject headings:
Ireland--Civilization--20th century--Congresses.
Ireland--Social life and customs--20th century--Congresses.
Irish literature--20th century--History and criticism--Congresses.