- Author: Christian Klie, Hans Kudlich, Christoph Krehl, Georg-Friedrich Güntge, Wilhelm Schluckebier, Gerhard Altvater
- Language: German
- Year: 2014
- Author: Christian Klie, Hans Kudlich, Christoph Krehl, Georg-Friedrich Güntge, Wilhelm Schluckebier, Gerhard Altvater
- Language: German
- Year: 2014