Wereldkampioen Dammen. De spelers R.C.Keller (links) en de Fransman Pierre Ghestem.
<div class="fn value">
Bram Wisman (Anefo)</div>
CC BY 4.0
Nationaal Archief, Fotocollectie Anefo, <a href="https://en.wikipedia.org/wiki/en:Nationaal_Archief" class="extiw" title="w:en:Nationaal Archief"><span title="National Archives of the Netherlands">Nationaal Archief</span></a>:  entry  <a rel="nofollow" class="external text" href="http://proxy.handle.net/10648/a8a8cbb2-d0b4-102d-bcf8-003048976d84">a8a8cbb2-d0b4-102d-bcf8-003048976d84</a>