BOSCHLOO, T. 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://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104164. Acesso em: 23 apr. 2024.