Hofker, J. (1963). Foraminifera from the Cretaceous of South Limburg, Netherlands. LXIII. Some rotaliid Foraminifera from the Lower Paleocene above the Maastrichtian Tuff chalk. Natuurhistorisch Maandblad. 53: 6-9.
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Hofker, J.
1963
Foraminifera from the Cretaceous of South Limburg, Netherlands. LXIII. Some rotaliid Foraminifera from the Lower Paleocene above the Maastrichtian Tuff chalk