By the Light of the Lanthorn : Working with People with Special NeedsSiegfried W. Rudel · First published 2011Open the Tome
Tennis- Methode. Definiertes Timing. Einheit von Wahrnehmung und Bewegung (Book on Demand)Siegfried Rudel · First published 1999Open the Tome
Rudolf Steiner and AnthroposophyFrans Carlgren, Joan Rudel, Siegfried Rudel · First published 1979Open the Tome