Bibliography : Dolphin
| Claudius Aelianus; A. F. Scholfield, trans. | On the Nature of Animals |
| John Ashton | Curious Creatures in Zoology |
| Willy Ley | Dawn of Zoology |
| Ann Payne | Medieval Beasts |
| J. L. Schrader, ed. | A Medieval Bestiary |
Bibliography : Dolphin
| Claudius Aelianus; A. F. Scholfield, trans. | On the Nature of Animals |
| John Ashton | Curious Creatures in Zoology |
| Willy Ley | Dawn of Zoology |
| Ann Payne | Medieval Beasts |
| J. L. Schrader, ed. | A Medieval Bestiary |