Cushman, J.A.; Bermúdez, P.J. 1948. Additional species of Paleocene Foraminifera from the Madruga Formation of Cuba. Contr. Cushman Lab. Foram. Res. 24(4): 85-89.
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Cushman, J.A.; Bermúdez, P.J. 1948. Additional species of Paleocene Foraminifera from the Madruga Formation of Cuba. Contr. Cushman Lab. Foram. Res. 24(4): 85-89.