| Sergei Mikhailovich Prokudin-Gorskii Laying concrete for the dam's sluice. [Beloomut] [Betonirovka fliutbeta plotiny. [Beloomut]] 1912 Digital Color composite from digital file from glass neg Library of Congress, Prints and Photographs Division Prokudin-Gorskii Collection [LC-DIG-prokc-21460] LL/1631
| |