Fries, W. “H. Würzner, K. Kröhnke, Deutsche Literatur Im Exil in Den Niederlanden 1933-1940”. BMGN - Low Countries Historical Review 111, no. 3 (January 1, 1996): 429–430. Accessed April 30, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104964.