KOTZÉ, J.C. DIE GEOMETRIESE EN RIVIERGRENSE VAN SUIDWES-AFRIKA, MET SPESIALE VERWYSING NA DIE NOORDE EN DIE CAPRIVISTROOK. Scientia Militaria - South African Journal of Military Studies, [S. l.], v. 18, n. 1, 2012. DOI: 10.5787/18-1-412. Disponível em: https://akroterion.journals.ac.za/index.php/pub/article/view/412. Acesso em: 12 jun. 2026.