Pacelli, Eugenio to Gasparri, Pietro from 30 June 1917, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 4738, URL: www.pacelli-edition.de/en/Document/4738. Last access: 03-04-2025.Online since 24-03-2010.