DE VILLIERS, Johan. Colonel John Graham of Fintry and the Fourth Cape Eastern Frontier War, 1811-1812. Scientia Militaria - South African Journal of Military Studies, [S. l.], v. 31, n. 2, 2012. DOI: 10.5787/31-2-150. Disponível em: https://www.journals.ac.za/index.php/pub/article/view/150. Acesso em: 11 jun. 2026.