U. Bosma, Karel Zaalberg. Journalist en strijder voor de Indo. BMGN - Low Countries Historical Review, [S. l.], v. 115, n. 4, p. 626–628, 2000. DOI: 10.18352/bmgn-lchr.5370. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106154.. Acesso em: 22 nov. 2024.