Barnard, T. (1963). The morphology and development of species of Marssonella and Pseudotextulariella from the Chalk of England. Palaeontology 6, 41–54.
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Barnard, T.
1963
The morphology and development of species of Marssonella and Pseudotextulariella from the Chalk of England. Palaeontology 6, 41–54