BRIEF OHNE UMSCHLAG Umrath, Wilhelm Author: Umrath, Wilhelm Recipient: Haeckel, Ernst Dating: 01.04.1918
BRIEF OHNE UMSCHLAG Umrath, Wilhelm Author: Umrath, Wilhelm Recipient: Haeckel, Ernst Dating: 19.03.1918
BRIEF OHNE UMSCHLAG Umrath, Wilhelm Author: Umrath, Wilhelm Recipient: Haeckel, Ernst Dating: 17.12.1913
BRIEF OHNE UMSCHLAG Umrath, Wilhelm Author: Umrath, Wilhelm Recipient: Haeckel, Ernst Dating: 03.02.1906
BRIEF OHNE UMSCHLAG Umrath, Wilhelm Author: Umrath, Wilhelm Recipient: Haeckel, Ernst Dating: 30.03.1906
BRIEF OHNE UMSCHLAG Umrath, Wilhelm Author: Umrath, Wilhelm Recipient: Haeckel, Ernst Dating: 04.05.1911
BRIEF OHNE UMSCHLAG Umrath, Wilhelm Author: Umrath, Wilhelm Recipient: Haeckel, Ernst Dating: 05.07.1911
BRIEF OHNE UMSCHLAG Umrath, Wilhelm Author: Umrath, Wilhelm Recipient: Haeckel, Ernst Dating: 19.02.1915