- Author: Franz Jostes (editor), Peter Schmitt (editor), Kurt Ruh (editor)
- Language: German
- Year: 1972
- Author: Kurt Ruh (editor)
- Language: German
- Year: 1985
Helmbrecht
pdf
- Author: Wernher der Gartenære (author), Friedrich Panzer (editor), Kurt Ruh (editor), Hans-Joachim Ziegeler (editor)
- Language: German
- Year: 1993
Helmbrecht
pdf
- Author: Wernher der Gartenære (editor), Friedrich Panzer (editor), Kurt Ruh (editor)
- Language: German
- Year: 1968