BERTELS, I. Bouwmaterialen 1940-1990: Vernieuwing, constructie, toepassing. Bulletin KNOB, [S. l.], v. 124, n. 1, p. 48–50, 2025. DOI: 10.48003/knob.124.2025.1.848. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/848. Acesso em: 26 mrt. 2025.