J.A. Klumper, Sociale verdediging en Nederlands verzet ’40-’45. Ideëel concept getoetst aan historische werkelijkheid. BMGN - Low Countries Historical Review, [S. l.], v. 100, n. 3, p. 499–501, 1985. DOI: 10.18352/bmgn-lchr.2648. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102873.. Acesso em: 23 nov. 2024.