Conti, M. A.; Monari, S.; Oliverio, M. (1993). Early rissoid gastropods from the Jurassic of Italy: the meaning of first appearances. Scripta Geologica Special Issue. 2: 67-74.
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Conti, M. A.; Monari, S.; Oliverio, M.
1993
Early rissoid gastropods from the Jurassic of Italy: the meaning of first appearances