Pacelli, Eugenio to Gasparri, Pietro from 18 January 1924, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 14728, URL: www.pacelli-edition.de/en/Document/14728. Last access: 15-03-2025.Online since 18-09-2015.