Vocal reinforcement : a practical study of the reinforcement of the motive power or breathing muscles of the resisting force or resistance in singing of tone color of correct thought of the resonance cavities of enunciation of the will or will-power of the emotions or feeling of expression, etc / by Edmund J. Myer.
Myer, Edmund J. (Edmund John), 1846-1934. | Date: [1891], ©1891