ZABORSKI, Andrzej. Sir Douglas Newbold’s File — an Unexplored Source to the Newest History of the Beja Tribes of the Sudan. Folia Orientalia, [S. l.], v. 8, p. 229–232, 2026. Disponível em: https://wydawnictwo.pan.pl/index.php/fo/article/view/2068. Acesso em: 20 aug. 2026.