Tennis players <a href="https://en.wikipedia.org/wiki/Kho_Sin-Kie" class="extiw" title="w:Kho Sin-Kie">Kho Sin Kie</a> (left) and Józef Hebda (right) in Warsaw.
Unknown author<span style="display: none;">Unknown author</span>
1939-08-14
<a rel="nofollow" class="external text" href="https://audiovis.nac.gov.pl/obraz/234468/bf89966310fccefd4ca1d7f7918c0b88/">Narodowe Archiwum Cyfrowe (NAC)</a> <br> Signature: 1-S-3162-4