Authors: Oskar Guttmann

  • Gymnastics Of The Voice A System Of Correct Breathing In Singing And Speaking, Based Upon Physiological Laws. A Self-instructor In The Training And Use Of The Singing And Speaking Voice — Oskar Guttmann

    Gymnastics Of The Voice A System Of Correct Breathing In Singing And Speaking, Based Upon Physiological Laws. A Self-instructor In The Training And Use Of The Singing And Speaking Voice — Oskar Guttmann