Van Heck, S. E.; Prins, B. (1987). A Refined Nannoplankton Zonation for the Danian of the Central North Sea. Abhandlungen der Geologischen Bundesanstalt in Wien. 39: 285-303, 20 figures, 1 plate.
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Van Heck, S. E.; Prins, B.
1987
A Refined Nannoplankton Zonation for the Danian of the Central North Sea
Abhandlungen der Geologischen Bundesanstalt in Wien