BRIEF OHNE UMSCHLAG Fürbringer, Max Author: Fürbringer, Max Recipient: Haeckel, Ernst Dating: 23.07.1897
BRIEF OHNE UMSCHLAG Fürbringer, Max Author: Fürbringer, Max Recipient: Haeckel, Ernst Dating: 27.09.1897
BRIEF OHNE UMSCHLAG Fürbringer, Max Author: Fürbringer, Max Recipient: Haeckel, Ernst Dating: 29.09.1897
BRIEF OHNE UMSCHLAG Fürbringer, Max Author: Fürbringer, Max Recipient: Haeckel, Ernst Dating: 10.10.1897
POSTKARTE Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 04.08.1897
BRIEF [O.A.] Blum, J... Author: Blum, J... Recipient: Haeckel, Ernst Corporation: Senckenbergische Naturforschende Gesellschaft Dating: 25.12.1897
BRIEF OHNE UMSCHLAG Bedriaga, Jacques von Author: Bedriaga, Jacques von Recipient: Haeckel, Ernst Dating: 26.08.1897
BRIEF [O.A.] Barret-Lennard, M... Author: Barret-Lennard, M... Recipient: Haeckel, Ernst Dating: 05.05.1897
POSTKARTE Barret-Lennard, M... Author: Barret-Lennard, M... Recipient: Haeckel, Ernst Dating: 23.06.1897
POSTKARTE Barret-Lennard, M... Author: Barret-Lennard, M... Recipient: Haeckel, Ernst Dating: 27.07.1897