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Baer, Karl Ernst von (1792-1876) (6)
Keyserling, Alexander (1815-)(6)
Middendorff, Alexander Theodor von(2)
Imperatorskaja akademija nauk (1803-1917) (6)
Baer, Karl Ernst von (1792-1876) (6)
Keyserling, Alexander (1815-)(6)
Middendorff, Alexander Theodor von(2)
Imperatorskaja akademija nauk (1803-1917) (6)