Robert Kreutzer Stütze!!? Atemtechnik
Robert Kreutzer Stütze!!? Atemtechnik, Exercise Book for Breathing Technique, Breathing Technique for Winds,Singers And Speakers - 7th Expanded Edition 2019, By Robert Kreutzer, Theoretical analysis and practical application, With new practical breathing exercises, ISBN 9783000035609, Format: DIN A5, 160 Pages, In German language