WOLFFRAM, D. R. Schuursma, Jaren van opgang. Nederland 1900-1930. BMGN - Low Countries Historical Review, [S. l.], v. 116, n. 4, p. 554–556, 2001. DOI: 10.18352/bmgn-lchr.5596. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106425. Acesso em: 23 apr. 2024.