Geys, J. F. 1983. Rachiosoma gigasei nov. spec. an addition to the echinoderm fauna of the Maastrichtian (Upper Cretaceous) of Belgium. Bulletin de la Société Belge de Géologie 92, 255-259.
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Geys, J. F.
1983
Rachiosoma gigasei nov. spec. an addition to the echinoderm fauna of the Maastrichtian (Upper Cretaceous) of Belgium
Bulletin de la Société Belge de Géologie