Abu-'l-Fidāʾ Ismāʿīl Ibn-ʿAlī
born 1273 in Damaskus; died 1331 in HamaBrief von Christian Martin Frähn an Karl Ernst von Baer, 1830 [o.D. (ca. 3.3.1830)]
Sankt Petersburg, 1830Humboldt, Alexander von
born 14. September 1769 in Berlin; died 6. May 1859 in BerlinBrief von Karl Friedrich Burdach an Karl Ernst von Baer, 20.03.1817 [20 März 17]
Königsberg, 20/03/1817