| John Stevens |
Hucbald, Guido, and John on Music: Three Medieval Treatises. (Music Theory Translation Series 3), by Warren Babb, Claude V. Palisca |
|
49/1, p. 99 |
| EMMA HORNBY |
Elizabeth Eva Leach, Sung Birds: Music, Nature and Poetry in the Later Middle Ages |
|
77/2, p. 328 |