“J.L. Van Der Gouw, De Landscheidingen Tussen Delfland, Rijnland En Schieland”. BMGN - Low Countries Historical Review 103, no. 4 (January 1, 1988): 654–655. Accessed November 24, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103399.