BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Knorr, Ludwig Dating: 12.05.1895
ZIRKULARBRIEF Winkelmann, Adolf Author: Winkelmann, Adolf Recipient: Haeckel, Ernst et al. Corporation: Philosophische Fakultät der Universität Jena Dating: 18.02.1896
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Snell, Karl Christian Philipp et al. Corporation: Philosophische Fakultät der Universität Jena Dating: 23.03.1874
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Stickel, Johann Gustav et al. Dating: 30.06.1874
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Stickel, Johann Gustav et al. Dating: 28.07.1874
BRIEF OHNE UMSCHLAG Schmidt, Moriz Author: Schmidt, Moriz Recipient: Haeckel, Ernst et al. Dating: 19.10.1874
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Snell, Karl Christian Philipp Dating: 11.05.1877
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Snell, Karl Christian Philipp et al. Dating: 12.06.1877
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Liebmann, Otto Dating: 19.01.1907
