Clef (English Wikipedia)

This notation is also used in the 1985 Hymns of the Church of Jesus Christ of Latter-day Saints for many of the men's arrangements, i.e. Hymns 323 and 325–337

doi.org (Global: 2^nd place; English: 2^nd place)

Curtis, Alan (1 April 1989). "La Poppea Impasticciata or, Who Wrote the Music to La Poppea Impasticciata (1643)?". Journal of the American Musicological Society. 42 (1): 23–54. doi:10.2307/831417. ISSN 0003-0139. JSTOR 831417.
Thomas, Bernard (1975). "The Renaissance Flute". Early Music. 3 (1): 2–10. doi:10.1093/earlyj/3.1.2. JSTOR 3125300.
Powers, Harold S. (1981). "Tonal Types and Modal Categories in Renaissance Polyphony". Journal of the American Musicological Society. 34 (3): 428–470. doi:10.1525/jams.1981.34.3.03a00030.
Kurtzman, J. G. (1994). "Tones, Modes, Clefs, and Pitch in Roman Cyclic Magnificats of the 16th Century". Early Music. 22 (4): 641–664. doi:10.1093/earlyj/xxii.4.641.
Parrott, Andrew (1984). "Transposition in Monteverdi's Vespers of 1610: an "Aberration" Defended". Early Music. 7 (4): 490–516. doi:10.1093/earlyj/12.4.490.

"Dolmetsch Online – Music Theory Online – Other Clefs". www.dolmetsch.com. Retrieved 1 September 2016.
Blood, Brian. "Other Clefs". Dolmetsch Online. Retrieved 9 May 2023.

Greer, Amy (2003). "In Praise of Those Grass-Eating Cows". American Music Teacher. 53 (1): 22–25. JSTOR 43547681.
Curtis, Alan (1 April 1989). "La Poppea Impasticciata or, Who Wrote the Music to La Poppea Impasticciata (1643)?". Journal of the American Musicological Society. 42 (1): 23–54. doi:10.2307/831417. ISSN 0003-0139. JSTOR 831417.
Thomas, Bernard (1975). "The Renaissance Flute". Early Music. 3 (1): 2–10. doi:10.1093/earlyj/3.1.2. JSTOR 3125300.

Ben (30 January 2020). "Alto Clef". Music Theory Academy. Retrieved 22 March 2024.

Nathan Rees, David Ivey and Jesse P. Karlsberg (16 July 2025). "Introducing "Collins," a New Shape-Note Music Typeface for The Sacred Harp: 2025 Edition". sacredharp.com. Sacred Harp Publishing Company. Retrieved 23 September 2025.

"Musical Scales and Frequencies". www1.swarthmore.edu. Retrieved 31 March 2026.

Curtis, Alan (1 April 1989). "La Poppea Impasticciata or, Who Wrote the Music to La Poppea Impasticciata (1643)?". Journal of the American Musicological Society. 42 (1): 23–54. doi:10.2307/831417. ISSN 0003-0139. JSTOR 831417.