<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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1898<div style="display: none;">date QS:P571,+1898-00-00T00:00:00Z/9</div>
1. <a rel="nofollow" class="external text" href="http://americangallery.wordpress.com/category/witkowski-karl/">americangallery.wordpress.com</a><br>2. <a rel="nofollow" class="external text" href="http://www.arcadja.com/auctions/de/private/witkowski__karl_karol/kunstwerken/30889/0/">Sotheby's New York, 01 March 2006, lot 56 via ARCADJA auction results</a>