Voice — Audiobooks
The Voice and Spiritual Education
by Hiram Corson
Vocal Expression: A Class-book of Voice Training and Interpretation
by Katherine Jewell Everts
The mechanism of the human voice
by Emil Behnke
Duality of Voice
by Emil Sutro
The Brain and the Voice in Speech and Song
by F. W. (Frederick Walker) Mott
Expressive Voice Culture, Including the Emerson System
by Jessie Eldridge Southwick
Psycho Vox; or, The Emerson System of Voice Culture
by Charles Wesley Emerson