“F. Boersma, F.G. Meyer, In Stug Verzet 1940-45. Herinneringen Van Grafici”. BMGN - Low Countries Historical Review 111, no. 3 (January 1, 1996): 433–435. Accessed July 2, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104967.