1 Hit for Author / Collaborator = "Usakov, Nikolaj Aleksandrovič" and Collection = Nachlass Baer, Karl Ernst

• Brief von Nikolaj Aleksandrovič Usakov an Karl Ernst von Baer Usakov, Nikolaj Aleksandrovič ; Baer, Karl Ernst von Vyšnij Voločëk [Wyschni Wolotschok], 20/08/1844