Die Bydrae van J.S. du Plessis (1919-1990) tot die Geskiedskrywing. Historia, [S. l.], v. 49, n. 2, 2021. Disponível em: https://upjournals.up.ac.za/index.php/historia/article/view/1688. Acesso em: 17 aug. 2026.