Colombijn, Freek. “C.J. Van Dullemen, Tropical Modernity: Life and Work of C.P. Wolff Schoemaker”. BMGN - Low Countries Historical Review 127, no. 2 (June 25, 2012): review 35. Accessed May 3, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-109819.