| Sergei Mikhailovich Prokudin-Gorskii Ural owls. From the collection of N.P. Alin in Cherdyn [Ural'skiťía sovy. Iz kollektsiťí N.P. Alina v Cherdyni] 1910 Digital Color composite from digital file from glass neg Library of Congress, Prints and Photographs Division Prokudin-Gorskii Collection [LC-DIG-prokc-20702] LL/1628
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