Bramlette, M. N.; Martini, E. (1964). The great change in calcareous nannoplankton fossils between the Maestrichtian and Danian. Micropaleontology. 10(3): 291-322, 1 figure, 1 table, 7 plates.
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Bramlette, M. N.; Martini, E.
1964
The great change in calcareous nannoplankton fossils between the Maestrichtian and Danian