Columbia subject headings:
Harvard subject headings:
D'Annunzio, Gabriele, 1863-1938--Dramatic works--Congresses.
Theater--Italy--History--19th century--Congresses.
Theater--Italy--History--20th century--Congresses.
Princeton subject headings:
D'Annunzio, Gabriele, 1863-1938--Congresses.
Theater--Italy--History--Congresses.