Rowson, B. (2007). Land molluscs of Zanzibar Island (Unguja), Tanzania, including a new species of Gulella (Pulmonata: Streptaxidae). Journal of Conchology 39: 425–466.
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Rowson, B.
2007
Land molluscs of Zanzibar Island (Unguja), Tanzania, including a new species of Gulella (Pulmonata: Streptaxidae).