Columbia subject headings:
D'Annunzio, Gabriele, 1863-1938--Correspondence.
De Titta, Filippo--Correspondence.
Harvard subject headings:
Authors, Italian--19th century--Correspondence
Authors, Italian--20th century--Correspondence
Authors, Italian--Correspondence.
D'Annunzio, Gabriele, 1863-1938--Correspondence.
De Titta, Filippo, 1853-1926--Correspondence.
De Titta, Filippo--Correspondence.
Princeton subject headings:
Authors, Italian--19th century--Correspondence.
Authors, Italian--20th century--Correspondence.
D'Annunzio, Gabriele, 1863-1938--Correspondence.
De Titta, Filippo, 1853-1926--Correspondence.