- Author: Andrew James Johnston, Margitta Rouse, Wilhelm Schmidt-Biggemann
- Language: German
- Year: 2018
- Author: Wilhelm Schmidt-Biggemann
- Language: German
- Year: 2004
- Author: Wilhelm Schmidt-Biggemann (editor), Theo Stammen (editor)
- Language: German
- Year: 1998
- Author: Paul Wilhelm Schmidt
- Language: German
- Year: 1874
- Author: Wilhelm Schmidt-Biggemann (editor)
- Language: German
- Year: 2016