Schoonheim, Marloes. “Koen Vossen, Vrij Vissen in Het Vondelpark: Kleine Politieke Partijen in Nederland 1918-1940”. TSEG - The Low Countries Journal of Social and Economic History 1, no. 3 (September 15, 2004): 131–133. Accessed November 24, 2024. https://tseg.nl/article/view/8115.