Etienne Steurbaut (1988)
New Early and Middle Eocene calcareous-nannoplankton events and correlations in middle to high latitudesof the northern hemisphere
Newsletters on Stratigraphy, vol. 18 (2) p. 99-115.
18544, .27, .83, .11, .88, .23, .39, .52, O, W, VB, BRAB3, EOC, STRATBIO
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