[{WikipediaArticle oldid='249448294'}]

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| Photo of Johann Georg Hagen (1847–1930) from The Catholic Encyclopedia and its Makers, 1917, pages 74–75| The Catholic Encyclopedia and its Makers, 1917, pages 74–75| Autor/-in unbekannt Unknown author| [{Image src='https://www.austria-forum.org/cc/images/slim/publicdomain.png' alt='Public domain' align='center' link='https://www.austria-forum.org/cc/public-domain-10.html' target='_blank'}]| Datei:Johann Georg Hagen (1847–1930).png
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