| Authors(s) | Ashcroft R.E. |
| Year | 1976 |
| Title | Breeding, biology and survival of puffins. Unpublished D.Phil. thesis, University Oxford: 246pp |
| Authors(s) | Ashcroft R.E. |
| Year | 1976 |
| Title | Breeding, biology and survival of puffins. Unpublished D.Phil. thesis, University Oxford: 246pp |