Note 250 — Chapter XXI · THE AMBROSIAN AND GREGORIAN CHANT.
Reading edition
Ambros, Geschicht der Musik, vol. 2, p. 14. Fetis, Biographie Univ. v. 1. p. 85.
Reading edition
Ambros, Geschicht der Musik, vol. 2, p. 14. Fetis, Biographie Univ. v. 1. p. 85.