Spiess, Andrea. “The Role of Environmental Degradation in Population Displacement and Conflict in Drylands of Sub-Saharan Africa (SSA) With Special Reference to Northern Nigeria”. Sociedade & Natureza 1, no. 1 (May 30, 2005). Accessed July 23, 2024. https://seer.ufu.br/index.php/sociedadenatureza/article/view/9808.