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van Aartsen, J.J. (1975). Alvania vermaasi nov. spec. , a new species of Gastropod from the Gulf of Algeciras (Spain). Basteria. 39(3-6): 91-96.
van Aartsen, J.J. (1975). Alvania vermaasi nov. spec. , a new species of Gastropod from the Gulf of Algeciras (Spain). Basteria. 39(3-6): 91-96.
