Sykes, E. R. (1893). On the Clausiliae of Sumatra, with descriptions of two new species and a new variety. Proceedings of the Malacological Society of London. 1: 28-30. London.
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Sykes, E. R.
1893
On the Clausiliae of Sumatra, with descriptions of two new species and a new variety
Proceedings of the Malacological Society of London