https://www.vatican.va/content/pius-xii/la/encyclicals/documents/hf_p-xii_enc_19071950_summi-maeroris.html
Summi maeroris, Pius PP. XII, MCML, Epistula Encylica, publicae preces, ad populorum impetrandam pacem, concordiam
summi maerorisdiexixiuliimcml