Observation
| Author(s) | Title | Reference | |
|---|---|---|---|
| R.W. Southern | Odo of Deuil De Profecitone Ludovici VII in Orientem, by V. G. Berry | 20/, p. 84 | |
| V.A. Eyles | Albertus Magnus: Book of Minerals, by Dorothy Wyckoff | 37/2, p. 234 |
| Author(s) | Title | Reference | |
|---|---|---|---|
| R.W. Southern | Odo of Deuil De Profecitone Ludovici VII in Orientem, by V. G. Berry | 20/, p. 84 | |
| V.A. Eyles | Albertus Magnus: Book of Minerals, by Dorothy Wyckoff | 37/2, p. 234 |