Pacelli, Eugenio to Gasparri, Pietro from 12 April 1921, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 11424, URL: www.pacelli-edition.de/en/Document/11424. Last access: 17-09-2024.Online since 14-05-2013, last modification 10-03-2014.