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Gittenberger, E. & Neuteboom, W. H. (1991). On Trichia alpicola (Eder, 1921) from Switzerland (Mollusca: Gastropoda Pulmonata:Hygromiidae) and the spiral sculpture on its shell. Zoologische Mededelingen. 65: 247-250. Leiden.
Gittenberger, E. & Neuteboom, W. H. (1991). On Trichia alpicola (Eder, 1921) from Switzerland (Mollusca: Gastropoda Pulmonata:Hygromiidae) and the spiral sculpture on its shell. Zoologische Mededelingen. 65: 247-250. Leiden.
