Anatoly Koni in his cabinet
Чернов. Я.М.
1921
<a rel="nofollow" class="external free" href="https://www.hermitagemuseum.org/wps/portal/hermitage/digital-collection/22.+Photos/862505/?lng=ru">https://www.hermitagemuseum.org/wps/portal/hermitage/digital-collection/22.+Photos/862505/?lng=ru</a> (Initially photo was misattributed to historian Vladimir Kurbatov)