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International Commission on Zoological Nomenclature, 1910. Opinion 21. Shall the Genera of Klein, 1744, Reprinted by Walbaum, 1792, be Accepted? Smithson. Publ. (no. 1938), Jul 1910: 51-52. [Reprint: ICZN, 1958. Ops. Decls. Int. Comm. Zool. Nomencl. 1 (B): 51-52] ≡