Cushman, J. A.; Stainforth, R. M. (1945). The foraminifera of the Cipero Marl Formation of Trinidad, British West Indies. Cushman Laboratory for Foraminiferal Research, Special Publication. 14: 1-75.
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Cushman, J. A.; Stainforth, R. M.
1945
The foraminifera of the Cipero Marl Formation of Trinidad, British West Indies
Cushman Laboratory for Foraminiferal Research, Special Publication