Periodicals
- Berliner Tageblatt
- Letter from: 12.9.1913, Oberbozen (Italy : Province Trentino)
- Letter from: 20.8.1914, Garmisch-Partenkirchen (Germany)
- Letter from: 21.7.1915, Dresden (Germany)
- Letter from: 9.5.1917, Oberammergau (Germany)
- Letter from: 13.5.1917, Ilipan
- Letter from: 14.5.1917, Oberammergau (Germany)
- Letter from: 18.5.1917, Ilipan
- Letter from: 29.5.1917, Ilipan
- Letter from: 4.6.1917, Oberammergau (Germany)
- Letter from: 24.6.1917, Ilipan
- Letter from: 14.7.1917, Ilipan
- Letter from: 7.8.1917, Ilipan
- Letter from: 13.8.1917, Oberammergau (Germany)
- Letter from: 23.8.1917, Ilipan
- Letter from: 25.8.1917, Ilipan
- Letter from: 13.9.1917, Oberammergau (Germany)
- Letter from: 7.10.1917, Dünastellung
- Letter from: 8.10.1917, Dünastellung
- Letter from: 11.10.1917, Dünastellung
- Letter from: 15.10.1917, Dünastellung
- Letter from: 20.10.1917, Garmisch-Partenkirchen (Germany)
- Letter from: 22.10.1917, Dünastellung
- Letter from: 6.11.1917-7.11.1917, Dünastellung
- Letter from: 11.11.1917-12.11.1917, Dünastellung
- Letter from: 13.11.1917, Charlottenburg (Berlin;Germany)
- Letter from: 16.11.1917, Charlottenburg (Berlin;Germany)
- Letter from: 22.11.1917-23.11.1917, Dünastellung
- Letter from: 15.7.1918, Pont du Hem
- Letter from: 30.09.1918, Charlottenburg (Berlin;Germany)
- Letter from: 30.6.1922, Schönwald im Schwarzwald (Germany)
- Letter from: 8.7.1922, Schönwald im Schwarzwald (Germany)
- Letter from: 22.10.1924, Pittsburgh
- Letter from: 5.7.1927, Båstad (Sweden)
- Letter from: 22.7.1928, Charlottenburg
- Letter from: 9.9.1932, Berlin-Spandau