J. WM Jagt and W. M Felder (1999)
The stratigraphic range of the index ammonite,Pachydiscus neubergicus (von Hauer,1858) in the Maastrichtian type area. In: Schulp,A.S.,Jagt,J.W.M. & de Graaf,D.Th.,eds. The 150th anniversary of the Maastrichtian stage: a celebratory conference
Natuurhistorisch Museum Maastricht, vol. p. 37-38.
09519, 107, Lg, MEUSE2, CRET, PAL, STRA
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