“H. Schmal, Nederland in De Twintigste Eeuw, H. Bas, K. Van Den Heuvel, Ed”. BMGN - Low Countries Historical Review 112, no. 2 (January 1, 1997): 294–296. Accessed November 23, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-105178.