Personal papers: letters, partly received as editor of Studi Sociali, from Diego Abad de Santillán 1934-1961, Francisco A. Barrios 1964-1965, Giovanna Berneri 1935-1959, Ugo Fedeli 1945-1951, 1961, José Grunfeld 1946, 1961-1964, Pedro Herrera 1965, Osvaldo Maraviglia 1945, 1947, 1954, 1962-1964, Rodolfo Mondolfo 1939-1970, Carlos Rama 1942, 1952-1953, 1955, Max Sartin (pseudonym of Raffaele Schiavina) 1948, 1956, 1962-1963, Augustin Souchy 1947, 1949, 1956, 1961, Renato Treves 1939, 1941, 1945, 1950, 1952, 1955, Pio Turroni 1939-1947, 1954 and many others 1930-1978; a series of correspondence, mainly concerning the Spanish Civil War 1936-1939; a manuscript entitled `Democrazia-Liberalismo-Socialismo-Anarchismo' 1953. Identification papers 1929, 1937; letters from Diego Abad de Santillán 1946, Luigi Bertoni 1946, Marie Louise Berneri 1944, Luis Barbetti 1957, Noémie Caneri 1937-1956, Maria Teresa Cortese 1952-1965, Ugo Fedeli 1939-1954, Pier Carlo Masini 1954- 1964, Clara and Jacques Mesnil 1929-1939, Ricardo Mestre 1986, Rodolfo Mondolfo 1955, 1960, Federica Montseny 1952-1954, Torquato Nanni 1987, Mattia Rossetti 1954, Helmut Rüdiger 1957, Aldo Venturini 1954, Gaetano Salvemini 1945, 1954, Augustin Souchy 1946, Giovanna Zaccaria 1953 and also correspondence with many others 1910-2000; books of condolence at the death of Luigi Fabbri, Ermacora Cressatti and Bianca Sbriccoli-Fabbri 1935, 1970 and 1972; letters of condolence at the death of Luigi Fabbri 1935; memo-books 1965, 1968, 1984, 1994 and n.d; manuscripts of Luce Fabbri's `Camisas Negras' 1935, `Luigi Fabbri: storia d'un uomo libero' 1996, and other handwritten and typed manuscripts of articles and notes 1931, 1962, 1985, c. 1990 and n.d.; file on her senior thesis concerning Elisé Reclus 1927-1930; file on the `Studi Sociali' c. 1930-1946; letters and other documents from Misato Toda 1982-1998; published articles and reviews 1929-2000; circulars, press clippings and other printed documents 1898-1998. Papers of others: letters to Bianca Sbriccoli-Fabbri 1950, 1952 and letters to Torquato Gobbi, including some other documents 1928-1955. Papers of others: Letters from Luigi Fabbri to Bianca Sbriccoli-Fabbri 1900-1907 and n.d. and letters from others to Bianca Sbriccoli-Fabbri 1906, 1927-1930, 1938; typescript and manuscripts from Libero Battistelli n.d. Accrual 2019 (inv. nos. 292-301): correspondence of Luce Fabbri and Ermacora Cressatti with a lot of family members 1932-2000 (-2011). This correspondence has been handed over also digitally to the IISH.