Seddon, M.B. (1990). Undescribed Quaternary land-snail species from SW Porto Santo (Madeiran Islands) (Mollusca: Gastropoda). Journal of Conchology. 33: 299-304.
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Seddon, M.B.
1990
Undescribed Quaternary land-snail species from SW Porto Santo (Madeiran Islands) (Mollusca: Gastropoda)