Marquet, R.; Lenaerts, J.; Karnekamp, C.; Smith, R. (2008). The molluscan fauna of the Borgloon Formation in Belgium (Rupelian, Early Oligocene). Palaeontos. 12: 1-100.
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Marquet, R.; Lenaerts, J.; Karnekamp, C.; Smith, R.
2008
The molluscan fauna of the Borgloon Formation in Belgium (Rupelian, Early Oligocene)