GRISBROOK, C. H. Notes on South African geology. South African Quarterly Journal, Cape Colony, v. 1, n. 4, p. 446–447, 1830. DOI: 10.21504/saqj.14.2674. Disponível em: https://journal.ru.ac.za/index.php/saqj/article/view/2674. Acesso em: 20 nov. 2025.