Encyclical letter Libertas Praestantissimum of the Supreme Pontiff Pope Leo XIII on human liberty, June 20, 1888.
| Egile nagusia: | |
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| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
Kansas City
Angelus Press
MI, 1998.
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| Edizioa: | Angelus Press Edition, February 1998. |
| Saila: | The great papal encyclicals
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| Gaiak: |