| Trích dẫn | Köller, J., J. Köppel and W. Peters, 2006 Offshore wind energy, research on environmental impacts. Springer: Germany. 371 pp. |
| Tài liệu tham khảo | 96344 Köller, J., J. Köppel and W. Peters, 2006 |
| Trang | 35 |
| Named Used as Valid | Halichoerus grypus |
| Địa phương | |
| Distribution | German North Sea. |