<bdi><a href="https://en.wikipedia.org/wiki/en:Karol_D._Witkowski" class="extiw" title="w:en:Karol D. Witkowski"><span title="Polish-American artist">Karl Witkowski</span></a>
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1899<div style="display: none;">date QS:P571,+1899-00-00T00:00:00Z/9</div>
1. <a rel="nofollow" class="external text" href="http://americanartgallery.org/artist/details/view/sshow/id/762">americanartgallery.org</a><br>2. <a href="https://en.wikipedia.org/wiki/Christie%27s" class="extiw" title="en:Christie's">Christie's</a>, LotFinder:  entry  <a rel="nofollow" class="external text" href="https://www.christies.com/LotFinder/lot_details.aspx?intObjectID=5290873">5290873</a> (sale 2285, lot 178, New York, 4 March 2010)<br>3. <a rel="nofollow" class="external text" href="https://www.bonhams.com/auctions/23480/lot/21/">Bonhams, New York, 22 November 2016, lot 21</a>