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Ohara, T. & Tomiyama, K. (2000). Niche segregation of coexisting two freshwater snail species, Semisulcospira libertina（Gould) (Prosobranchia: Pleuroceridae) and Clithon retropictus (Martens) (Prosobranchia: Neritidae). Venus (Journal of the Malacological Society of Japan). 59 (2): 135-147.
Ohara, T. & Tomiyama, K. (2000). Niche segregation of coexisting two freshwater snail species, Semisulcospira libertina（Gould) (Prosobranchia: Pleuroceridae) and Clithon retropictus (Martens) (Prosobranchia: Neritidae). Venus (Journal of the Malacological Society of Japan). 59 (2): 135-147.
