Vaughan, T. W. (1929). Descriptions of new species of foraminifera of the genus Discocyclina from the Eocene of Mexico. Proceedings of the United States National Museum. 76(3)[1930]: 1-18.
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Vaughan, T. W.
1929
Descriptions of new species of foraminifera of the genus Discocyclina from the Eocene of Mexico