J De Coninck (1993)
Diachronism of the Deflandrea oebisfeldensis acme towards the southern margin of the Belgian basin
Bulletin de la Société belge de Géologie, vol. 102 p. 105-115.
04494, .11, .27, .83, .86, .91, .98, 103, 113, 115, W, O, VB, BW, Ht, BRAB3, EOC, STRATBIO, PALMIC
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