Vaughan, T. W.; Cole, W. S. (1932). Cretaceous orbitoidal foraminifera from the Gulf states and central America. Proceedings of the National Academy of Sciences U.S.A. 18: 611-618.
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Vaughan, T. W.; Cole, W. S.
1932
Cretaceous orbitoidal foraminifera from the Gulf states and central America
Proceedings of the National Academy of Sciences U.S.A.