REINSMA, R. In memoriam Dr. J.J. Westendorp boerma 1901-1970. BMGN - Low Countries Historical Review, [S. l.], v. 86, n. 1, p. 157–157, 1971. DOI: 10.18352/bmgn-lchr.1658. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107774. Acesso em: 8 feb. 2023.