Cushman, J. A.; Waters, J. A. (1928). Some Foraminifera from the Pennsylvanian and Permian of Texas. Contributions from the Cushman Laboratory for Foraminiferal Research. 4(2): 31-55.
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Cushman, J. A.; Waters, J. A.
1928
Some Foraminifera from the Pennsylvanian and Permian of Texas
Contributions from the Cushman Laboratory for Foraminiferal Research