Cockerell, T. D. A. (1921). The anatomy and relationships of Helix subplicata, Sowerby. Proceedings of the Malacological Society of London. 14: 191-195.
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Cockerell, T. D. A.
1921
The anatomy and relationships of <i>Helix subplicata</i>, Sowerby
Proceedings of the Malacological Society of London