KEEL, William D. Donald F. Durnbaugh: In Memoriam. Yearbook of German-American Studies, [S. l.], v. 40, p. 1–2, 2005. DOI: 10.17161/ygas.v40i.18998. Disponível em: https://journals.ku.edu/ygas/article/view/18998. Acesso em: 13 apr. 2025.