BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 09.05.1871
BRIEF OHNE UMSCHLAG Wundt, Wilhelm Author: Wundt, Wilhelm Recipient: Haeckel, Ernst Dating: 03.05.1871
BRIEF OHNE UMSCHLAG Weismann, August Author: Weismann, August Recipient: Haeckel, Ernst Dating: 13.02.1871
BRIEF OHNE UMSCHLAG Weismann, August Author: Weismann, August Recipient: Haeckel, Ernst Dating: 31.05.1871
BRIEF OHNE UMSCHLAG Rohrbach, C... Author: Rohrbach, C... Recipient: Haeckel, Ernst Dating: 11.10.1871
BRIEF OHNE UMSCHLAG Rohrbach, C... Author: Rohrbach, C... Recipient: Haeckel, Ernst Dating: 30.12.1871
BRIEF OHNE UMSCHLAG Strasburger, Eduard Author: Strasburger, Eduard Recipient: Haeckel, Ernst Dating: 30.08.1871