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Sohl, N. F. (1964). Neogastropoda, Opisthobranchia and Basommatophora from the Ripley, Owl Creek and Prairie Bluff Formations. United States Geological Survey Professional Paper. 331-B: iv + 153–344, pls. 19–52.
Sohl, N. F. (1964). Neogastropoda, Opisthobranchia and Basommatophora from the Ripley, Owl Creek and Prairie Bluff Formations. United States Geological Survey Professional Paper. 331-B: iv + 153–344, pls. 19–52.
