Godwin-Austen, H. H. (1881). On the land-shells of the Island of Socotra collected by Prof. Bayley Balfour. Part I. Cyclostomaceae. Proceedings of the Zoological Society of London. 49 (2): 251-258, pls 27-28. London [August].
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Godwin-Austen, H. H.
1881
On the land-shells of the Island of Socotra collected by Prof. Bayley Balfour. Part I. Cyclostomaceae