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Vaughan, T. W. (1929). Studies of Orbitoidal Foraminifera: The Subgenus Polylepidina of Lepidocyclina and Orbitocyclina, a New Genus. Proceedings of the National Academy of Sciences of the United States of America. 15(3): 288-295.
Vaughan, T. W. (1929). Studies of Orbitoidal Foraminifera: The Subgenus Polylepidina of Lepidocyclina and Orbitocyclina, a New Genus. Proceedings of the National Academy of Sciences of the United States of America. 15(3): 288-295.