Il fiore delle lettere epistolario - D'Annunzio, Gabriele 1863-1938 (Ed. dell'Orso, 2004)
Contains introduction by the editor (p. v-lxii), bibliography (p. 547-578), bibl. references, notes and name index (p. 579-597). - Letters, some of which publ. for the first time, partly in French