Ansell, A. D., Scottish Association for Marine Science

• Digital Treatise Part H, Brachiopoda (Revised), vol. 1 (1997) - Chapters
  Part H, Brachiopoda (Revised), vol. 1, ch. 2, p. 189–242
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• Digital Treatise Part H, Brachiopoda (Revised), vol. 1 (1997) - Chapters
  Part H, Brachiopoda (Revised), vol. 1, Complete Volume
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