| Publication Type: | Journal Article |
| Year of Publication: | 1959 |
| Authors: | Humphries, D.A. |
| Journal: | Report of the Bardsey Bird and Field Observatory (1958) 6: 40-41. |
| Pagination: | 240 |
| Publication Type: | Journal Article |
| Year of Publication: | 1959 |
| Authors: | Humphries, D.A. |
| Journal: | Report of the Bardsey Bird and Field Observatory (1958) 6: 40-41. |
| Pagination: | 240 |