Robert Popper

<strong>Quelle:</strong> <a rel="nofollow" class="external text" href="https://www.flickr.com/people/22017657@N05">vagueonthehow</a> - <a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/22017657@N05/4849425346">Robert Popper</a>

<strong>Quelle:</strong> <a href="https://en.wikipedia.org/wiki/User:Stalane" class="extiw" title="en:User:Stalane">Stalane</a> - <span class="int-own-work" lang="">Own work by the original uploader</span>

<strong>Quelle:</strong> <a href="//commons.wikimedia.org/w/index.php?title=User:Ringhunt&amp;action=edit&amp;redlink=1" class="new" title="User:Ringhunt (page does not exist)">Ringhunt</a> - <span class="int-own-work" lang="en">Own work</span>

<strong>Quelle:</strong> - This file was contributed to Wikimedia Commons by <a href="https://www.wikidata.org/wiki/Q59661072" class="extiw" title="d:Q59661072"><span title="reference unit of the National Archives and Records Administration">National Archives at Washington, DC - Textual Reference</span></a> as part of a cooperation project. The donation was facilitated by the <a href="https://en.wikipedia.org/wiki/Digital_Public_Library_of_America" class="extiw" title="w:Digital Public Library of America">Digital Public Library of America</a>, via its partner <a href="https://en.wikipedia.org/wiki/en:Digital_Public_Library_of_America" class="extiw" title="w:en:Digital Public Library of America"><span title="American library project">Digital Public Library of America</span></a>.<span style="text-align:left"> <ul><li><a rel="nofollow" class="external text" href="https://catalog.archives.gov/id/91766547">Record in source catalog</a></li> <li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/b266f9c31b5ff8055bad18a1d515999e">b266f9c31b5ff8055bad18a1d515999e</a></li> <li>National Archives Identifier: 91766547</li></ul></span>

<strong>Quelle:</strong> - This file was contributed to Wikimedia Commons by <a href="https://en.wikipedia.org/wiki/en:National_Archives_and_Records_Administration" class="extiw" title="w:en:National Archives and Records Administration"><span title="United States government agency">National Archives and Records Administration</span></a> as part of a cooperation project. The donation was facilitated by the <a href="https://en.wikipedia.org/wiki/Digital_Public_Library_of_America" class="extiw" title="w:Digital Public Library of America">Digital Public Library of America</a>, via its partner <a href="https://en.wikipedia.org/wiki/en:Digital_Public_Library_of_America" class="extiw" title="w:en:Digital Public Library of America"><span title="American library project">Digital Public Library of America</span></a>.<span style="text-align:left"> <ul><li><a rel="nofollow" class="external text" href="https://catalog.archives.gov/id/91559448">Record in source catalog</a></li> <li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/0722c573dbc79850517be05204f5cc8c">0722c573dbc79850517be05204f5cc8c</a></li> <li>National Archives Identifier: 91559448</li></ul></span>

<strong>Quelle:</strong> - This file was donated to Wikimedia Commons as part of a project by the <a href="//commons.wikimedia.org/wiki/Commons:Met" title="Commons:Met">Metropolitan Museum of Art</a>. See the <a rel="nofollow" class="external text" href="https://metmuseum.org/about-the-met/policies-and-documents/image-resources">Image and Data Resources Open Access Policy</a>