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Riedel, A. (1985). Über die makedonischen Gyralina-Arten (Gastropoda, Zonitidae). Fragmenta Balcanica. 12 (4 (265)): 31-43.
Riedel, A. (1985). Über die makedonischen Gyralina-Arten (Gastropoda, Zonitidae). Fragmenta Balcanica. 12 (4 (265)): 31-43.
