- Author: Gerhard Grethlein
- Language: German
- Year: 1961
- Author: Johannes Gerstmeyer (editor)
- Language: German
- Year: 1910
- Author: Anton Romen (editor)
- Language: German
- Year: 1917
- Author: Hans Rüdorff
- Language: German
- Year: 1876
- Author: Reinhard von Godin (editor), Hans von Godin (editor), Tölke (editor)
- Language: German
- Year: 1950