GUGGISBERG, H. L. Hanssen, W.E. Krul, A. van der Lem, Briefwisseling, III, 1934-1945, L. Hanssen, W. E. Krul, A. van der Lem, ed. BMGN - Low Countries Historical Review, [S. l.], v. 108, n. 3, p. 532–534, 1993. DOI: 10.18352/bmgn-lchr.3761. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104314. Acesso em: 6 may. 2024.