BMGN - LCHR, The editors. “Signaleringen - Signposts”. BMGN - Low Countries Historical Review 128, no. 4 (November 1, 2013): signposts 4. Accessed October 22, 2021. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-110014.