VAN DER WAAG, Ian. COLONEL (DR) JAN PLOEGER (1913-1994). Scientia Militaria - South African Journal of Military Studies, [S. l.], v. 24, n. 2, 2012. DOI: 10.5787/24-2-270. Disponível em: https://akroterion.journals.ac.za/index.php/pub/article/view/270. Acesso em: 12 jun. 2026.