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 mines in the Olonets district and collect pieces of ore and different rarities for Mineral room of the Academy of Science | |
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National Archives of Karelia : Archival Mosaic of Karelian Culture | |