BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Grober, Julius Dating: 30.04.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Grober, Julius Dating: 25.07.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Engelmann, Wilhelm Dating: 17.07.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Elisabeth Dating: 20.08.1917
BRIEF OHNE UMSCHLAG Grober, Julius Author: Grober, Julius Recipient: Haeckel, Ernst Dating: 10.07.1917
BRIEF OHNE UMSCHLAG Grober, Julius Author: Grober, Julius Recipient: Haeckel, Ernst Dating: 30.04.1917
BRIEF OHNE UMSCHLAG Grober, Julius Author: Grober, Julius Recipient: Haeckel, Ernst Dating: 08.07.1917
BRIEF OHNE UMSCHLAG Daelen, Eduard Author: Daelen, Eduard Recipient: Haeckel, Ernst Dating: 06.03.1917
BRIEF OHNE UMSCHLAG Daelen, Eduard Author: Daelen, Eduard Recipient: Haeckel, Ernst Dating: 02.08.1917
BRIEF OHNE UMSCHLAG Daelen, Eduard Author: Daelen, Eduard Recipient: Haeckel, Ernst Dating: 14.08.1917