SNODGRASS, Margaret. The Kat River Valley, Balfour and Hertzog. Toposcope, Port Alfred, South Africa, v. 54, 2023. DOI: 10.21504/vhkswx72. Disponível em: https://journal.ru.ac.za/index.php/toposcope/article/view/2573. Acesso em: 1 nov. 2025.