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Contralto - Wikipedia
List of contraltos in non-classical music - Wikipedia
What is a contralto? - Classical Music
Best contraltos of all time: are these the 10 greatest ever?
The mysterious Contralto voice in opera - A complete guide.
Contralto Definition & Meaning - Merriam-Webster
5.6: Contralto - Humanities LibreTexts
Understanding Voice Types: Contralto • Opera For All
Contralto | vocal range | Britannica
Talk Like An Opera Geek: Managing Mezzos, Altos And Contraltos - NPR