de Kerf, Raoul. “Siger Zeischka, Minerva in De Polder. Waterstaat En Techniek in Het Hoogheemraadschap Van Rijnland (1500-1856)”. TSEG - The Low Countries Journal of Social and Economic History 7, no. 1 (March 15, 2010): 139–141. Accessed November 22, 2024. https://tseg.nl/article/view/7633.