Gradual - Footnotes

Footnotes

1. ^ Apel, Willi, ed (1972). Harvard Dictionary of Music, 2nd edition. Cambridge, Harvard University Press. Page 350.
2. ^ Abbaye Saint-Pierre de Solesmes (1979). Graduale Triplex. Tournai, Belgium: Desclée & Socii. ISBN 2-85274-094-X.
3. ^ Apel, Willi (1990). Gregorian Chant. Bloomington, IN: Indiana University Press. ISBN 0-253-20601-4.
4. ^ Hoppin, Richard (1978). Medieval Music. New York: W. W. Norton & Company. ISBN 0-393-09090-6.
5. ^ Hiley, David (1995). Western Plainchant: A Handbook. New York: Oxford University Press Inc.. ISBN 0-19-816572-2.
6. ^ Apel (1972), ibid.