| Trích dẫn | Jefferson, T.A., S. Leatherwood and M.A. Webber, 1993 FAO species Identification Guide: Marine Mammals of the World. Rome, FAO. 320 p. + 587 figures. |
| Tài liệu tham khảo | 1394 Jefferson, T.A., S. Leatherwood and M.A. Webber, 1993 |
| Trang | 266-267 |
| Named Used as Valid | Phoca caspica |
| Địa phương | |
| Distribution |