STANDARD, R. UK for ban on trade in ivory. Pachyderm, [S. l.], v. 11, n. 1, p. 33–33, 1989. DOI: 10.69649/pachyderm.v11i1.683. Disponível em: https://pachydermjournal.org/index.php/pachyderm/article/view/683. Acesso em: 24 apr. 2026.