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Ponder, W.F. (1990). The anatomy and relationships of the Orbitestellidae (Gastropoda: Heterobranchia). Journal of Molluscan Studies. 56: 515-532.
Ponder, W.F. (1990). The anatomy and relationships of the Orbitestellidae (Gastropoda: Heterobranchia). Journal of Molluscan Studies. 56: 515-532.
