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://jsaa.ac.za/index.php/yesterday_and_today/article/view/2270.. Acesso em: 15 mar. 2025.