Columbia subject headings:
Harvard subject headings:
D'Annunzio, Gabriele, 1863-1938--Criticism and interpretation.
Pirandello, Luigi, 1867-1936--Criticism and interpretation.
Princeton subject headings:
D'Annunzio, Gabriele, 1863-1938--Criticism and interpretation.
Pirandello, Luigi, 1867-1936--Criticism and interpretation.