Bruggen, A. C. van. (1966). Two new species of Gulella from southern Africa (Gastropoda, Pulmonata, Streptaxidae). Archiv für Molluskenkunde. 95(1/2): 69–73.
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Bruggen, A. C. van
1966
Two new species of <i>Gulella</i> from southern Africa (Gastropoda, Pulmonata, Streptaxidae).