BRIEF OHNE UMSCHLAG Bergfeld, Ludwig Author: Bergfeld, Ludwig Recipient: Haeckel, Ernst Dating: 25.12.1908
BRIEF OHNE UMSCHLAG Bergfeld, Ludwig Author: Bergfeld, Ludwig Recipient: Haeckel, Ernst Dating: 30.12.1908
BRIEF OHNE UMSCHLAG Ammann, Wilhelm Author: Ammann, Wilhelm Recipient: Haeckel, Ernst Dating: 30.12.1878
BRIEF OHNE UMSCHLAG Allmers, Hermann Author: Allmers, Hermann Recipient: Haeckel, Ernst Dating: 28.03.1888
BRIEF OHNE UMSCHLAG Albers, Hellmuth Author: Albers, Hellmuth Recipient: Haeckel, Ernst Dating: 17.02.1907
BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 25.09.1858
BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 21.07.1862
BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 10.08.1862
BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 22.04.1863