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Cleevely, R. J.; Morris, N. J. (1988). Taxonomy and ecology of Cretaceous Cassiopidae (Mesogastropoda). Bulletin of the British Museum (Natural History). 44(4): 233-291.
Cleevely, R. J.; Morris, N. J. (1988). Taxonomy and ecology of Cretaceous Cassiopidae (Mesogastropoda). Bulletin of the British Museum (Natural History). 44(4): 233-291.