<a href="https://en.wikipedia.org/wiki/Cossacks" class="extiw" title="en:Cossacks">en:Cossacks</a>. May 5, 1916. <a href="https://en.wikipedia.org/wiki/Goryachy_Klyuch" class="extiw" title="en:Goryachy Klyuch">en:Goryachy Klyuch</a>. Russian Empire.
Unknown author<span style="display: none;">Unknown author</span>
1916-05
<a rel="nofollow" class="external free" href="http://graf-sheremetev.livejournal.com/103382.html">http://graf-sheremetev.livejournal.com/103382.html</a> - Personal family archive Dmitry Sheremetyev.