Preece, R.C. & Gittenberger, E. (2003). Systematics, distribution and Ecology of Baela (=Tristania) (Pulmonata: Clausiliidae) in the Islands of the Tristan-Gough group. Journal of Molluscan Studies, 69: 329-348. London.
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Preece, R.C. & Gittenberger, E.
2003
Systematics, distribution and Ecology of Baela (=Tristania) (Pulmonata: Clausiliidae) in the Islands of the Tristan-Gough group