Sheila Noth; Peter Bruckschen; Detlev K. Richter. Conodont Color Alteration and Microdolomite Composition - Implications to the Muschelkalk Limestones (Upper Triassic) Overlying the Upper Cretaceous Intrusive Body of the Vlotho Massif (Weserbergland, Northwest Germany). njg 1991, 265-273.