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Cushman, J. A.; Wickenden, R. T. D. (1930). The development of Hantkenina in the Cretaceous with a description of a new species. Contributions from the Cushman laboratory for foraminiferal research. 6(2): 39-43.
Cushman, J. A.; Wickenden, R. T. D. (1930). The development of Hantkenina in the Cretaceous with a description of a new species. Contributions from the Cushman laboratory for foraminiferal research. 6(2): 39-43.