Etienne Steurbaut (1983)
The stratigraphic position of the Lower Oligocene Yrieu Sands (Southwestern France), based on calcareous nannofossils and a new Helicosphaera species.
Eclogae geologicae Helvetiae, 76(2):327-331.
Open Access, Impact Factor, International Redaction Board, RBINS Collection(s)
Paleontology, Geology
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