Pacelli, Eugenio to Gasparri, Pietro from 26 June 1920, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 15820, URL: www.pacelli-edition.de/en/Document/15820. Last access: 03-04-2025.Online since 10-03-2014.