van Rooij, Arjan. “Modellen Van Onderzoek. De Oprichting Van TNO, 1920-1940”. TSEG - The Low Countries Journal of Social and Economic History 4, no. 4 (December 15, 2007): 136–160. Accessed April 11, 2026. https://testplatform.openjournals.nl/tseg/article/view/7901.