Verdcourt, B. (1953). Notes on the snails of north-east Tanganyika Territory. 6. Five new species and varieties of Gulella from the Usambaras. Proceedings of the Malacological Society of London. 30: 36–39.
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Verdcourt, B
1953
Notes on the snails of north-east Tanganyika Territory. 6. Five new species and varieties of Gulella from the Usambaras.
Proceedings of the Malacological Society of London