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SPb Academy of Sciences Kachalov dr Mahaev . en Petersburg Academy of Sciences Engraving of Kachalov by drawing of Makhaev ru Serge Lachinov file Makhayev KachalovViewofNevaDownstreambetweenWinterPalaceandAcademyofSciences right PDold Engravings Mikhail Lomonosov Mikhail Makhaev Historical
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