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Monograph on the foraminifera of the type locality of the Maestrichtian (south Limburg), Netherland.
| Visser, A.M., | |
| 1951 | |
| Leidse Geologische Mededelingen, v.16, | |
| Monograph on the foraminifera of the type locality of the Maestrichtian (south Limburg), Netherland. |
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.