Carteggio (1899 - 1905) - Croce, Benedetto 1866-1952; Vailati, Giovanni 1863-1909 (Bonanno, 2006)
Contains introduction (p. 7-40), bibliography, bibliographical references, notes, name index and appendix of ducuments in facs. repr. (p. 121-134). - Letters, those by G. Vailati (1863-1909) publ. for the first time