- Author: Heinz-Dieter Ebbinghaus Jörg Flum Wolfgang Thomas
- Language: English
- Year: 2021
- Author: Heinz-Dieter Ebbinghaus Jörg Flum Wolfgang Thomas
- Language: English
- Year: 2021
- Author: Heinz-Dieter Ebbinghaus Jörg Flum Wolfgang Thomas
- Language: English
- Year: 1984