Rooy, P. de. “De Verzuiling Vergruisd, De Columnologie in Opmars”. BMGN - Low Countries Historical Review 100, no. 1 (January 1, 1985): 65–69. Accessed November 21, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102757.