Visser, 1951
From dinoflaj2
Visser, A.M., 1951: Monograph on the foraminifera of the type locality of the Maestrichtian (south Limburg), Netherland. Leidse Geologische Mededelingen, v.16, p.202-233, pl.1-16.
Visser, A.M., 1951: Monograph on the foraminifera of the type locality of the Maestrichtian (south Limburg), Netherland. Leidse Geologische Mededelingen, v.16, p.202-233, pl.1-16.
