NEGASH, G. The Economics of Khat Trade and its Dynamic Institutions: The Ethiopian Context since the 1980s. Ethiopian Journal of the Social Sciences and Humanities, [S. l.], v. 16, n. 1, p. 75–102, 2023. Disponível em: http://ejol.aau.edu.et/index.php/EJSSH/article/view/6373. Acesso em: 20 nov. 2024.