Columbia subject headings:
European drama--20th century--History and criticism--Congresses.
Pirandello, Luigi, 1867-1936--Criticism and interpretation--Congresses.
Theater--Europe--History--20th century--Congresses.
Harvard subject headings:
European drama--20th century--History and criticism--Congresses.
Pirandello, Luigi, 1867-1936--Criticism and interpretation--Congresses.
Theater--Europe--History--20th century--Congresses.
Princeton subject headings:
Italian drama--20th century--History and criticism--Congresses.
Pirandelli, Luigi, 1867-1936--Criticism and interpretation--Congresses.