Sykes, E. R. (1909). The land and freshwater Mollusca of the Seychelles Archipelago. Transactions of the Linnean Society of London (Zoology). Ser. 2, 13: 57-64.
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Sykes, E. R.
1909
The land and freshwater Mollusca of the Seychelles Archipelago
Transactions of the Linnean Society of London (Zoology)