instrumentation
| Author(s) | Title | Reference | |
|---|---|---|---|
| Christopher Page | Studies in the Performance of Late Medieval Music, by Stanley Boorman | 55/1, p. 154 | |
| JOHN CALDWELL | The Early Middle Ages to 1300 (The New Oxford History of Music, Vol. II), by Richard Crocker, David Hiley | 60/2, p. 335 |