| Trích dẫn | Rice, D.W., 1998 Marine Mammals of the World Systematics and Distribution. Special Publication number 4: The Society for Marine Mammalogy. 231p. |
| Tài liệu tham khảo | 1522 Rice, D.W., 1998 |
| Trang | 38 |
| Named Used as Valid | Phoca vitulina richardii |
| Địa phương | |
| Distribution | Mexico, Alaska, British Columbia, USA, Gulf of California. |