Gary, Anthony C.; Healy-Williams, Nancy (1987): Establishment of morphozones in gradually evolving lineages; Sphaeroidinellopsis-Sphaeroidinella. [Society of Economic Paleontologists and Mineralogists, Gulf Coast Section.], [Dallas, TX], United States, In: McNulty, Charles L. (chairperson), Waterman, Arthur S. (chairperson), Innovative biostratigraphic approaches to sequence analysis; new exploration opportunities, 8, 61-64, georefid:1988-060079

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Expedition: 68
Site: 68-502
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