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Impact of Labour, Capital and Human Resources in Productivity of Transport Firms in Nigeria. International Journal of Sustainable Development & World Policy, [S. l.], v. 1, n. 1, p. 60–65, 2012. Disponível em: https://archive.conscientiabeam.com/index.php/26/article/view/2017. Acesso em: 22 jul. 2026.