Rookmaaker, L.C. “Miscounted Population of the Southern White Rhinoceros (Ceratotherium Simum Simum) in the Early 19th [=20th] Century?”. Pachyderm 32, no. 1 (June 30, 2002): 22–28. Accessed July 3, 2024. https://pachydermjournal.org/index.php/pachyderm/article/view/1082.