On Laburn’s ‘mystery’ query – A prehistory of the Vaal River as water source of the Witwatersrand (1887-99) . Historia, [S. l.], v. 45, n. 1, 2021. Disponível em: http://www.jsaa.ac.za/index.php/historia/article/view/1996. Acesso em: 7 nov. 2025.