Cushman, J. A. (1925). Some new Foraminifera from the Velasco Shale of Mexico. Contributions from the Cushman Laboratory for Foraminiferal Research. 1: 18-23.
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Cushman, J. A.
1925
Some new Foraminifera from the Velasco Shale of Mexico
Contributions from the Cushman Laboratory for Foraminiferal Research