“De Crisis in De Rechtse Samenwerking (1925-1926)”. BMGN - Low Countries Historical Review 92, no. 3 (January 1, 1977): 406–437. Accessed September 28, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102168.