4 Titles for Jackson, Julian R...

• Brief von Adolph Theodor Kupffer an Karl Ernst von Baer, 1842 [Donnerstag o.D. (1842?)] Kupffer, Adolph Theodor, Kupffer, Adolph Theodor ; Baer, Karl Ernst von, Baer, Karl Ernst von ; Jackson, Julian R., Jackson, Julian R. ; Royal Geographical Society Sankt Petersburg, 1842

• Brief von Julian R. Jackson von Royal Geographical Society an Karl Ernst von Baer, 11.03.1842 [11th March 1842] Jackson, Julian R., Jackson, Julian R. ; Royal Geographical Society ; Baer, Karl Ernst von, Baer, Karl Ernst von ; Imperatorskaja Akademija Nauk London, 11/03/1842

• Brief von Julian R. Jackson an Karl Ernst von Baer, 20.05.1842 [20th May 1842] Jackson, Julian R., Jackson, Julian R. ; Baer, Karl Ernst von, Baer, Karl Ernst von ; Kupffer, Adolph Theodor, Kupffer, Adolph Theodor ; Vrangel', Ferdinand P., Vrangel', Ferdinand P. London, 20/05/1842

• Brief von Julian R. Jackson von Royal Geographical Society an Karl Ernst von Baer, 14.02.1846 [14th Feby 1846] Jackson, Julian R., Jackson, Julian R. ; Royal Geographical Society ; Baer, Karl Ernst von, Baer, Karl Ernst von London, 14/02/1846