Streel et al., 1977
From dinoflaj3
Streel, M., Fairon-Demaret, M., Bick, H., Schumacker-Lambry, J. and Vanguestaine, M., 1977: Macro and microplant fossils in litho and biostrat of the Senonian-Paleocene Left Bank of the Meuse, north Belgium. Guidebook of excursion, "Recent Techniques in Palynology", Université de Liège, 87 p., 12 pl.