Dinoflagellate, sporomorph, and micropaleontological zonation of Callovian to Ryazanian strata in the Central North Sea Graben, the Netherlands.
Reference:
Herngreen,G.F.W. et al. (1988)
Dinoflagellate, sporomorph, and micropaleontological zonation of Callovian to Ryazanian strata in the Central North Sea Graben, the Netherlands. International Symposium on Jurassic Stratigraphy
P. 745- 762