Hoffmann 1977
<ul><li><a href="//commons.wikimedia.org/wiki/File:Michelau_Kirche_Orgel.jpg" title="File:Michelau Kirche Orgel.jpg">File:Michelau Kirche Orgel.jpg</a>: <a href="//commons.wikimedia.org/wiki/User:Regerman" title="User:Regerman">Regerman</a></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Subbass1" title="User:Subbass1">Subbass1</a></li></ul>
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