Willems, 1996
From dinoflaj2
Willems, H., 1996: Calcareous dinocysts from the Geulhemmerberg K/T boundary section (Limburg, se Netherlands). Geologie en Mijnbouw, v.75, p.215-231, pl.1-2.
Willems, H., 1996: Calcareous dinocysts from the Geulhemmerberg K/T boundary section (Limburg, se Netherlands). Geologie en Mijnbouw, v.75, p.215-231, pl.1-2.
