Bosmans, J. “J. P. De Valk, A.C.M. Kappelhof (ed.), Dagboeken Van P. J. M. Aalberse 1902-1947”. BMGN - Low Countries Historical Review 123, no. 1 (January 1, 2008): 151–153. Accessed April 25, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107769.