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Rohr, D. M.; Potter, A. W. (1987). Rousseauspira: New gastropod operculum from the Ordovician of Alaska and California. Journal of Paleontology. 61(2): 284-289.
Rohr, D. M.; Potter, A. W. (1987). Rousseauspira: New gastropod operculum from the Ordovician of Alaska and California. Journal of Paleontology. 61(2): 284-289.
