Columbia subject headings:
Ireland--Economic conditions--Congresses.
Ireland--Social life and customs--20th century--Congresses.
Northern Ireland--Economic conditions--20th century--Congresses.
Northern Ireland--Social life and customs--Congresses.
Harvard subject headings:
Ireland--Economic conditions--1949---Congresses.
Ireland--Economic conditions--20th century--Congresses.
Ireland--Social life and customs--20th century--Congresses.
Northern Ireland--Economic conditions--Congresses.
Northern Ireland--Social life and customs--Congresses.
Princeton subject headings:
Ireland--Economic conditions--20th century--Congresses.
Ireland--Social life and customs--20th century--Congresses.
Northern Ireland--Economic conditions--20th century--Congresses.
Northern Ireland--Social life and customs--20th century--Congresses.