Rudolf Blümner

<strong>Quelle:</strong> Photographer not credited, probably <a href="//commons.wikimedia.org/wiki/Category:Herwarth_Walden" title="Category:Herwarth Walden">Herwarth Walden</a> (1878-1941) - <a rel="nofollow" class="external text" href="https://digi.ub.uni-heidelberg.de/diglit/walden1963/0045/image">Nell Walden: <i>Herwarth Walden: ein Lebensbild</i> — Berlin, Mainz, 1963</a>

<strong>Quelle:</strong> <bdi><a href="https://en.wikipedia.org/wiki/en:Georg_Schrimpf" class="extiw" title="w:en:Georg Schrimpf"><span title="artist (1889-1938)">Georg Schrimpf</span></a> </bdi> - <a rel="nofollow" class="external text" href="https://www.dieschmiede.nl/subjects.php?lang=de&amp;cust_id=&amp;cat=Expressionismus#nogo">die schmiede.nl</a>

<strong>Quelle:</strong> Rudolf Blümner - <a rel="nofollow" class="external free" href="http://bluemountain.princeton.edu/bluemtn/?a=d&amp;d=bmtnabg19190810-01.1.1">http://bluemountain.princeton.edu/bluemtn/?a=d&amp;d=bmtnabg19190810-01.1.1</a>

<strong>Quelle:</strong> Herwarth Walden - <a rel="nofollow" class="external text" href="https://digi.ub.uni-heidelberg.de/diglit/walden1963/0096/image">Nell Walden: <i>Herwarth Walden: ein Lebensbild</i> — Berlin, Mainz: Florian Kupferberg, 1963</a>

<strong>Quelle:</strong> Rudolf Blümner, D.O., Kurt Schwitters, Herwarth Walden - <a rel="nofollow" class="external free" href="http://bluemountain.princeton.edu/bluemtn/?a=d&amp;d=bmtnabg19190810-01.1.1">http://bluemountain.princeton.edu/bluemtn/?a=d&amp;d=bmtnabg19190810-01.1.1</a>