Columbia subject headings:
Community theater--Ireland.
Community theater--Northern Ireland.
Theater--Ireland--History--20th century.
Theater--Northern Ireland--History--20th century.
Harvard subject headings:
English drama--20th century--History and criticism--Congresses.
English drama--Irish authors--History and criticism--Congresses.
Ireland--In literature--Congresses.
Theater--Ireland--History--20th century--Congresses.
Princeton subject headings:
English drama--20th century--History and criticism--Congresses.
English drama--Irish authors--History and criticism--Congresses.
Ireland--In literature--Congresses.
Theater--Ireland--History--20th century--Congresses.