PREDICTION OF CONCRETE MIX COST USING MODIFIED REGRESSION THEORY. Nigerian Journal of Technology, [S. l.], v. 32, n. 2, p. 211–216, 2013. DOI: 10.4314/njt.322.651. Disponível em: https://nijotech.com/index.php/nijotech/article/view/651. Acesso em: 21 apr. 2026.