Burning Warsaw in September 1939
Unknown author<span style="display: none;">Unknown author</span>
<ul><li><cite class="book" style="font-style:normal">Jerzy Piorkowski (1957)      <i> Miasto Nieujarzmione</i>, <a href="https://en.wikipedia.org/wiki/en:Warsaw" class="extiw" title="w:en:Warsaw"><span title="capital and largest city of Poland">Warsaw</span></a>:  Iskry, pp. 18  <small>no ISBN</small></cite></li>
<li><a rel="nofollow" class="external free" href="http://www.ww2.pl/apps/?command=fotografie/szczegoly&amp;id=106&amp;did=9">http://www.ww2.pl/apps/?command=fotografie/szczegoly&amp;id=106&amp;did=9</a></li>
<li><a rel="nofollow" class="external text" href="https://audiovis.nac.gov.pl/obraz/115926/c277521f24c8510e29124a7c18fc7130/">Narodowe Archiwum Cyfrowe (Sygnatura: 37-133-1)</a> (Polish National Digital Archive)</li></ul>