H.E.R. Sandberg, De PTT in bevrijd Zuid-Nederland. 4 oktober 1944-28 juli 1945. BMGN - Low Countries Historical Review, [S. l.], v. 111, n. 2, p. 288–289, 1996. DOI: 10.18352/bmgn-lchr.4274. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104910.. Acesso em: 22 nov. 2024.