| Authors(s) | Ewins P.J. |
| Year | 1987 |
| Title | Opportunistic feeding of Black Guillemots Cepphus grylle at fishing vessels. Seabird 10: 58-59 |
| Authors(s) | Ewins P.J. |
| Year | 1987 |
| Title | Opportunistic feeding of Black Guillemots Cepphus grylle at fishing vessels. Seabird 10: 58-59 |