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von Middendorff circa 1880
von Middendorff circa 1880
Coat of arms of the Middendorff family [et], in the Baltic Coat of arms book by Carl Arvid von Klingspor in 1882.
Coat of arms of the Middendorff family [et], in the Baltic Coat of arms book by Carl Arvid von Klingspor in 1882.
Permafrost occurrences and southern limit of permafrost, from Karl Ernst von Baer's instructions to Middendorff, 1843
Permafrost occurrences and southern limit of permafrost, from Karl Ernst von Baer's instructions to Middendorff, 1843
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Karl Ernst von Baer
Karl Ernst von Baer
Lasila manor, Estonia, where von Baer spent his early childhood
Lasila manor, Estonia, where von Baer spent his early childhood
Permafrost occurrences and southern limit of permafrost according to Karl Ernst von Baer, 1843
Permafrost occurrences and southern limit of permafrost according to Karl Ernst von Baer, 1843
Southern limit of permafrost according to Karl Ernst von Baer (1843), and other authors. The southern limit of permafrost as delineated by Baer in 184
Southern limit of permafrost according to Karl Ernst von Baer (1843), and other authors. The southern limit of permafrost as delineated by Baer in 1843 corresponds well with the actual limit defined by Jerry Brown (1998).