| 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. |
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