| Ref. No. | Title |
|---|---|
| 28211 | The systematics of the prickly sculpin, Cottus asper Richardson, a polytypic species. Part II. Studies on the life history, with special reference to migration. |
| 28919 | The systematics of the prickly sculpin, Cottus asper Richardson, a polytypic species. Part I. Synonymy, nomenclatural history, and distribution. |