| Trích dẫn | Hammond, P.S., A.J. Hall and J.H. Prime, 1994 The diet of grey seals around Orkney and other island and mainland sites in north-eastern Scotland. Journal of Applied Ecology 31:340-350. |
| Tài liệu tham khảo | 8715 Hammond, P.S., A.J. Hall and J.H. Prime, 1994 |
| Trang | 340-350 |
| Named Used as Valid | Halichoerus grypus |
| Địa phương | |
| Distribution | Orkney and Scotland. |