W. K Christensen and F Schmid (1987)
The belemnites of the Vaals Formation from the C.P.L. Quarry at Hallembaye in Belgium - Taxonomy,biometry and biostratigraphy
Geologisches Jahrbuch, vol. A94 p. 3-37.
12441, 107, Lg, MEUSE2, CRET, PAL, STRATBIO
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