BRIEF OHNE UMSCHLAG Barth, Heinrich Author: Barth, Heinrich Recipient: Haeckel, Ernst Dating: 26.05.1860
BRIEF OHNE UMSCHLAG Barth, Heinrich Author: Barth, Heinrich Recipient: Haeckel, Ernst Dating: 14.06.1860
BRIEF OHNE UMSCHLAG Haeckel, Carl Gottlob Author: Haeckel, Carl Gottlob Recipient: Weiss, Christian Dating: 10.01.1853
BRIEF OHNE UMSCHLAG Braun, Alexander Author: Braun, Alexander Recipient: Haeckel, Ernst Dating: 17.03.1855
BRIEF OHNE UMSCHLAG Braun, Alexander Author: Braun, Alexander Recipient: Haeckel, Ernst Dating: 27.06.1858
BRIEF OHNE UMSCHLAG Braun, Alexander Author: Braun, Alexander Recipient: Haeckel, Ernst Dating: 16.10.1862
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Lachmann, Johannes Dating: 15.02.1857
