
- Author: Harald Nahrstedt (auth.)
- Language: German
- Year: 1980

- Author: Harald Nahrstedt
- Language: German
- Year: 2008

- Author: Harald Nahrstedt
- Language: German
- Year: 2006

- Author: Harald Nahrstedt
- Language: German
- Year: 2008

- Author: Harald Nahrstedt
- Language: German
- Year: 2006

- Author: Harald Nahrstedt
- Language: English
- Year: 2008