Pacelli, Eugenio to [Gasparri, Pietro] from 06 June 1929, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 20768, URL: www.pacelli-edition.de/en/Document/20768. Last access: 03-04-2025.Online since 20-01-2020.