<div class="fn value">
Unknown artist<span style="display: none;">Unknown artist</span> from Cologne</div>
Maria Romanowska-Zadrożna ed. (2001) <i>Wartime losses. Ancient art. Objects lost in Poland in the years 1939-1945</i>. Polish Ministry of Culture, Art and National Heritage. <a href="//commons.wikimedia.org/wiki/Special:BookSources/83-88163-44-2" title="Special:BookSources/83-88163-44-2">ISBN 83-88163-44-2</a>