BOERSMA, K. J.W. Schot, Techniek in Nederland in de twintigste eeuw, II, Delfstoffen, energie, chemie; J.W. Schot, Techniek in Nederland in de twintigste eeuw, III, Landbouw, voeding. BMGN - Low Countries Historical Review, [S. l.], v. 116, n. 4, p. 549–551, 2001. DOI: 10.18352/bmgn-lchr.5593. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106421. Acesso em: 4 may. 2024.