
- Author: G.A. Wagner
- Language: German
- Year: 1998

- Author: George Rapp (auth.)
- Language: English
- Year: 2009

- Author: George Rapp (auth.)
- Language: English
- Year: 2009

- Author: George Rapp (auth.)
- Language: English
- Year: 2009

- Author: Andreas Hauptmann
- Language: English
- Year: 2007