de Graaf, Ton. “Josef Vos En Gerarda Westerhuis, Kredietwaardigheid Verzilverd: BNG Bank 1914-2014”. TSEG - The Low Countries Journal of Social and Economic History 12, no. 3 (September 15, 2015): 136–138. Accessed November 25, 2024. https://tseg.nl/article/view/7358.