Pacelli, Eugenio to Gasparri, Pietro from 22 April 1921, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 11398, URL: www.pacelli-edition.de/en/Document/11398. Last access: 21-09-2024.Online since 14-05-2013, last modification 10-03-2014.