Wikidata entity: Q1235037
| P50 | author | ... | Q23873 (John XXIII) | John XXIII |
| P31 | instance of | ... | Q221409 (encyclical) | encyclical |
| P921 | main subject | ... | Q4207746 (apostolate) | apostolate |
| P577 | publication date | ... | 1959-11-28 | ??? |
| P1476 | title | Monolingualtext | Princeps pastorum | ??? |
| P646 | Freebase ID | /m/069zj9 |
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