WESTERN, D.; COBB, S. The ivory trade review. Pachyderm, [S. l.], v. 11, n. 1, p. 12–12, 1989. DOI: 10.69649/pachyderm.v11i1.674. Disponível em: https://pachydermjournal.org/index.php/pachyderm/article/view/674. Acesso em: 22 apr. 2026.