Cushman, Joseph A. & Cahill, Edgar D. Miocene Foraminifera of the Coastal Plain of the Eastern United States, report, 1933; (https://digital.library.unt.edu/ark:/67531/metadc784443/m1/1/: accessed June 25, 2021), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .

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