Gibson, Deborah, G. Craig, and Rapelang Masogo. “Trends of the Elephant Population in Northern Botswana from Aerial Survey Data”. Pachyderm 25, no. 1 (July 15, 1998): 14–27. Accessed June 18, 2026. https://pachydermjournal.org/index.php/pachyderm/article/view/914.