One of the four <a href="https://en.wikipedia.org/wiki/Sonderkommando_photographs" class="extiw" title="en:Sonderkommando photographs">en:Sonderkommando photographs</a> taken by an inmate inside Auschwitz, August 1944, and smuggled out of the camp by the Polish underground. This is photograph number 283 of four photographs (#280–283). See <a href="//commons.wikimedia.org/wiki/Category:Auschwitz_resistance_photos" title="Category:Auschwitz resistance photos">Category:Auschwitz resistance photos</a>. The other three images in the series were published in Poland in the 1950s, and are in the public domain, but it appears that this image was not found until later.  Date of first publication not known.
Alberto Errera
<p><a href="https://en.wikipedia.org/wiki/Jean-Claude_Pressac" class="extiw" title="w:Jean-Claude Pressac">Jean-Claude Pressac</a>, <i>Auschwitz: Technique and Operation of the Gas Chambers</i>, Beate Klarsfeld Foundation, 1989, p. 422.
</p><p>Also in Dan Stone, <a rel="nofollow" class="external text" href="http://www.jstor.org/stable/4467613">"The Sonderkommando Photographs"</a>, <i>Jewish Social Studies</i>, 7(3), Spring/Summer 2001, (pp. 132–148), p. 136. Also <a rel="nofollow" class="external text" href="https://web.archive.org/web/20050802103430/http://www.sonderkommando-studien.de/artikel.php?c=fotografie/resistance">here</a> and <a rel="nofollow" class="external text" href="http://iconicphotos.wordpress.com/2010/09/02/the-sonderkommando-photos/">here</a>.
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The author was Alex, Aleko or Alekos, a member of the Sonderkommando from Greece, often named as Alberto, Albert or Alex Errera, a Greek army or naval officer who died in Auschwitz in 1944.<p>
For Errera's death, see Gideon Graif, <i>We Wept Without Tears: Testimonies of the Jewish Sonderkommando from Auschwitz</i>, Yale University Press, 2005, p. 375; Steven Bowman, <i>The Agony of Greek Jews, 1940–1945</i>, Stanford University Press, 2009, p. 95; Shlomo Venezia, <i>Inside the Gas Chambers: Eight Months in the Sonderkommando of Auschwitz</i>, John Wiley &amp; Sons, 2013, p. 90ff.</p>