G.F.W. Herngreen, C. Hartkopf-Froder and G.H.J. Ruegg 1994. Errata: Age and depositional environment of the Kuhfeld Beds (Lower Cretaceous) in the Alstatte Embayment (W Germany, E Netherlands), Geologie en Mijnbouw 72: 375-391, 1994. Netherlands Journal of Geosciences. 73, (Jan. 1994), 85.