National Archives of Karelia : Archival Mosaic of Karelian Culture | |
Decree of the State Berg-Board to the Olonets-Petrovsky works" Administration to let E.G.Laxman, an academician, to inspect the works and collect samples for Mineral room of the Academy of Science | |
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National Archives of Karelia : Archival Mosaic of Karelian Culture | |