Cushman, J. A. (1925). Three new species of Siphogenerina from the Miocene of California. Contributions from the Cushman Laboratory for Foraminiferal Research. 1: 2-3.
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Cushman, J. A.
1925
Three new species of Siphogenerina from the Miocene of California.
Contributions from the Cushman Laboratory for Foraminiferal Research