BRIEF OHNE UMSCHLAG Schleicher, August Author: Schleicher, August Recipient: Haeckel, Ernst Dating: 09.03.1863
BRIEF OHNE UMSCHLAG Schleicher, August Author: Schleicher, August Recipient: Haeckel, Ernst Dating: 05.09.1863
BRIEF OHNE UMSCHLAG Gegenbaur, Carl Author: Gegenbaur, Carl Recipient: Haeckel, Ernst Dating: 18.04.1863
BRIEF OHNE UMSCHLAG Carus, Carl Gustav Author: Carus, Carl Gustav Recipient: Haeckel, Ernst Corporation: Academia Caesarea Germanica Leopoldino-Carolina [Leopoldina] Dating: 13.12.1863
BRIEF OHNE UMSCHLAG Aegidi, Ludwig Karl Author: Aegidi, Ludwig Karl Recipient: Haeckel, Ernst Dating: 24.01.1863
BRIEF OHNE UMSCHLAG Aegidi, Ludwig Karl Author: Aegidi, Ludwig Karl Recipient: Haeckel, Ernst Dating: 16.02.1863
BRIEF OHNE UMSCHLAG Aegidi, Ludwig Karl Author: Aegidi, Ludwig Karl Recipient: Haeckel, Ernst Dating: 21.03.1863
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 10.06.1863
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 27.07.1863
BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 22.04.1863
