Deursen, A.Th. van. β€œIn Memoriam Dr. F.B.M. Tangelder 1907-1970”. BMGN - Low Countries Historical Review 86, no. 1 (January 1, 1971): 156–156. Accessed December 22, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107765.