Coffin's Sounds of Singing: Principles and Applications of Vocal Techniques with Chromatic Vowel Chart
A strongly recommended addition to professional and academic vocal music instructional reference collections…an in-depth informational compendium concerning the production of resonating notes, and is informatively enhanced with interviews with expert teachers, diagrams, exercises and more, clearly marking it as a professional quality reference and instructional aide. (The Bookwatch)Should prove useful in comparative vocal pedagogy courses and in the graduate music library. (Choice)