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Baer, Karl Ernst von (1792-1876) (2)
Litke, Ḟedor P. (1797-1882)(2)
Middendorff, Alexander Theodor von(2)
Royal Geographical Society (1830-1994) (2)
Baer, Karl Ernst von (1792-1876) (2)
Litke, Ḟedor P. (1797-1882)(2)
Middendorff, Alexander Theodor von(2)
Royal Geographical Society (1830-1994) (2)