| Citation | Schreiber, R.W., 1970 Breeding biology of Western gulls (Larus occidentalis) on San Nicolas Island, California, 1968. The Condor 72:133-140. |
| Ref. | 80153 Schreiber, R.W., 1970 |
| Page | |
| Named Used as Valid | Larus occidentalis |
| Locality | |
| Distribution | California. |