Ploeger, Jan. “MONUMENTE TER GEDAGTENIS AAN LT. KOL HENNING P.N. PRETORIUS (1844-1897) IN DIE TRANSVAALSE HOOFSTAD”. Scientia Militaria - South African Journal of Military Studies 14, no. 1 (February 28, 2012). Accessed April 27, 2024. https://scientiamilitaria.journals.ac.za/pub/article/view/533.