“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 1, no. 1 (March 20, 2025): 59–69. Accessed June 3, 2026. https://journals.ipsintelligentsia.com/engineering-technology/index.php/ijet/article/view/14.