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Zentralbibliothek Zrich Portrt von Adam Johann von Krusenstern .tif de Portrt von Adam Johann von Krusenstern institution Zentralbibliothek Zrich object history credit line accession number Public domain ZentralbibliothekZrichPortrtvonAdamJohannvonKrusenstern ZentralbibliothekZrich MediacontributedbyZentralbibliothekZrich original