J.G.S.J. van Maareveen, Briefwisseling van Nicolaas Gerard Pierson 1839-1909, I, 1851-1884. BMGN - Low Countries Historical Review, [S. l.], v. 108, n. 1, p. 94–96, 1993. DOI: 10.18352/bmgn-lchr.3631. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104164.. Acesso em: 24 nov. 2024.