“J.G.S.J. Van Maareveen, Briefwisseling Van Nicolaas Gerard Pierson 1839-1909, I, 1851-1884”. BMGN - Low Countries Historical Review 108, no. 1 (January 1, 1993): 94–96. Accessed November 24, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104164.