- Dame Clara Butt
- Emma Seiler
- Frederick James Crowest
- Gabriele Fantoni
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Vocal Expression: A Class-book of Voice Training and Interpretation
Katherine Jewell EvertsKatherine Jewell Everts - W. E. Haslam
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Observations on the Florid Song; Or, Sentiments on the Ancient and Modern Singers
Pier Francesco Tosi - Millie Ryan
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The Psychology of Singing A Rational Method of Voice Culture Based on a Scientific Analysis of All Systems, Ancient and Modern
David C. Taylor - Frank E. Miller
- Scrici
- Enrico Caruso
- Society of Friends
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- D. A. Clippinger
- Lilli Lehmann
- Thomas Fillebrown
- Jessie Eldridge Southwick