Pacelli, Eugenio to Ottaviani, Alfredo from 27 July 1929, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 20547, URL: www.pacelli-edition.de/en/Document/20547. Last access: 06-10-2024.Online since 20-01-2020, last modification 01-02-2022.