Annual report of the South African Institution read 13th June 1831. South African Quarterly Journal, Cape Colony, v. 1, n. 5, p. 113–121, 1831. DOI: 10.21504/saqj.15.2610. Disponível em: https://journal.ru.ac.za/index.php/saqj/article/view/2610. Acesso em: 20 nov. 2025.