Analysis of Nigerian leather industries economic sustainability using Parametric cost model approach; A case study of establishing Aba leather industry. IPS Journal of Engineering and Technology, [S. l.], v. 1, n. 1, p. 59–69, 2025. DOI: 10.54117/ijet.v1i1.14. Disponível em: https://journals.ipsintelligentsia.com/engineering-technology/index.php/ijet/article/view/14. Acesso em: 3 jun. 2026.