Periodicals
- Vossische Zeitung
- Letter from: 12.3.1918, Libau
- Letter from: 14.3.1918, Libau
- Letter from: 24.3.1918, Libau
- Letter from: 2.4.1918, Libau
- Letter from: 7.4.1918, Libau
- Letter from: 15.7.1918, Pont du Hem
- Letter from: 17.7.1918, Port du Hem
- Letter from: 20.7.1918, Charlottenburg (Berlin;Germany)
- Letter from: 22.7.1918, Charlottenburg (Berlin;Germany)
- Letter from: 30.09.1918, Charlottenburg (Berlin;Germany)
- Letter from: 4.10.1918, Charlottenburg (Berlin;Germany)
- Letter from: 20.10.1918, Charlottenburg (Berlin;Germany)
- Letter from: 20.10.1918, Charlottenburg (Berlin;Germany)
- Letter from: 22.10.1918, Hal
- Letter from: 25.10.1918, Hal