de, Iongh, Martin Tchamba, Per Aarhaug, and Bas Verhage. “Impact of Dam Construction on Two Elephant Populations in Northern Cameroon”. Pachyderm 36, no. 1 (June 30, 2004): 30–43. Accessed July 3, 2024. https://pachydermjournal.org/index.php/pachyderm/article/view/1179.