1. Bristol: 01.11.1922 Type: programme Subject: Blesková centrála; Blesková ústředna Language: Czech and German Rights: Creative Commons BY 4.0
2. Excelsior: 16.09.1922 Type: programme Subject: Blesková centrála; Blesková ústředna Language: Czech and German Rights: Creative Commons BY 4.0
3. Moravia: 04.11.1922 Type: programme Subject: Blesková centrála; Blesková ústředna Language: Czech and German Rights: Creative Commons BY 4.0