Ehepaar Dagestan 1907
<bdi><a href="https://en.wikipedia.org/wiki/en:Sergey_Prokudin-Gorsky" class="extiw" title="w:en:Sergey Prokudin-Gorsky"><span title="Russian chemist and photographer">Sergei Prokudin-Gorskii</span></a>
</bdi>
1907
Library of Congress, Prints &amp; Photographs Division, Prokudin-Gorskii Collection, [reproduction number, LC-DIG-ppmsc-04437] <a rel="nofollow" class="external free" href="https://www.loc.gov/rr/print/res/237_prok.html">https://www.loc.gov/rr/print/res/237_prok.html</a>