Heilmann-Clausen and Thomsen, 1995
From dinoflaj2
Heilmann-Clausen, C. and Thomsen, E., 1995: Barremian-Aptian dinoflagellates and calcareous nannofossils in the Ahlum 1 Borehole and the Otto Gott Clay pit, Sarstedt, Lower Saxony Basin, Germany. Geologisches Jahrbuch, Reihe A, v.141, p.257-365, pl.1-20.
