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2. Type land snails in the Academy of Natural Sciences of Philadelphia Part II. Land Pulmonata, exclusive of North America North of Mexico;Baker H. B.;Proceedings of the Academy of Natural Sciences of Philadelphia,1963
3. List of types of Amphineura and Gastropoda in the collection of the Carnegie Museum;Brooks S. T.;Annals of the Carnegie Museum,1931
4. Activity of different species of land‐snail on surfaces of different inclinations;Cain A.;Journal of Conchology,1978