Li, Y.-T. (1988). The emendation of diagnosis of the land snails Nanxiongospira and Undatornatus. Professional Papers of Stratigraphy and Palaeontology. 20: 155-160.
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Li, Y.-T.
1988
The emendation of diagnosis of the land snails <i>Nanxiongospira</i> and <i>Undatornatus</i>
Professional Papers of Stratigraphy and Palaeontology