Historic Environment Education – Vaal River tunnels: The forgotten history of the early days of coal in the Vereeniging area. Yesterday & Today Journal for History Education in South Africa and abroad, [S. l.], v. 12, 2021. Disponível em: http://www.jsaa.ac.za/index.php/yesterday_and_today/article/view/2270. Acesso em: 7 nov. 2025.