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| Arbeiter-Schachzeitung (Austrian newspaper from 1921)| http://anno.onb.ac.at/cgi-content/anno-plus?aid=asc&datum=1921&page=1&size=45| 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:Arbeiter-Schachzeitung.jpg
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