VAN DER WAAG, Ian. TIlE FORTS OF THE LIESBEECK FRONTIER. Scientia Militaria - South African Journal of Military Studies, [S. l.], v. 27, n. 1, 2012. DOI: 10.5787/27-1-235. Disponível em: https://www.journals.ac.za/index.php/pub/article/view/235. Acesso em: 12 jun. 2026.