Hoogovens Chess Tournament 1990. Rini Kuijf vs. John Nunn
Fotopersburo De Boer
<a rel="nofollow" class="external text" href="https://hdl.handle.net/21.12102/bd670db8-c06c-0508-9505-c4d4e1fa01a8">Noord-Hollands Archief</a>, NL-HlmNHA 1478 31803K00 27