Compare Gymnastics of the Voice by Oskar Guttmann, Paperback | Indigo Chapters
Oskar Guttmann
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a System of Correct Breathing in Singing and Speaking, Based Upon Physiological Laws. A Practical Guide in the Training and Use of the Singing and Speaking Voice, Designed for Schools and for Self-instruction | Gymnastics of the Voice by Oskar Guttmann, Paperback | Indigo Chapters
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