4 literature references for Phoca vitulina richardsi (Gray, 1864):
| Author: |
– |
| Year: |
1996 |
| Title: |
– |
| Source: |
database, NODC Taxonomic Code |
| Author: |
Wilson, Don E., and DeeAnn M. Reeder, eds. |
| Year: |
1992 |
| Title: |
– |
| Source: |
Mammal Species of the World: A Taxonomic and Geographic Reference, 2nd ed., 3rd printing |
| Author: |
Rice, Dale W. |
| Year: |
1998 |
| Title: |
Marine Mammals of the World: Systematics and Distribution |
| Source: |
Special Publications of the Society for Marine Mammals, no. 4 |
| Author: |
– |
| Year: |
1998 |
| Title: |
– |
| Source: |
website, Mammal Species of the World |
