- Author: Helmut Eichlseder Manfred Klell (auth.)
- Language: German
- Year: 2010
- Author: Helmut Eichlseder Manfred Klell (auth.)
- Language: German
- Year: 2008
- Author: Helmut Eichlseder Manfred Klell (auth.)
- Language: German
- Year: 2010
- Author: Helmut Eichlseder Manfred Klell (auth.)
- Language: German
- Year: 2008