Petrus Helias
| Author(s) | Title | Reference | |
|---|---|---|---|
| F.M. Powicke | Mediaeval and Renaissance Studies. vol. II, by Richard Hunt, Raymond Klibansky | 21/, p. 40 |
| Author(s) | Title | Reference | |
|---|---|---|---|
| F.M. Powicke | Mediaeval and Renaissance Studies. vol. II, by Richard Hunt, Raymond Klibansky | 21/, p. 40 |