- Author: Zacher Ewald
- Language: German
- Year: 1973
- Author: Schmitt Carl, Huber Ernst Rudolf, Grothe Ewald
- Language: German
- Year: 2014
- Author: Richter Ewald
- Language: German
- Year: 1996
- Author: Richter Ewald
- Language: German
- Year: 2005
- Author: Richter Ewald
- Language: German
- Year: 1992
- Author: Kininger Ewald
- Language: German
- Year: 1971
- Author: Kininger Ewald
- Language: German
- Year: 1980
- Author: Hubert Ewald J., Nagel Kurt
- Language: German
- Year: 2010
- Author: Grothe Ewald
- Language: German
- Year: 1996
- Author: Chase Reynolds Ewald Heather Sandy Hebert
- Language: English
- Year: 2023