EMPIRICAL STRENGTHS OF CONCRETE ROOF SLABS AFTER 34 YEARS SERVICE IN NIGERIA. Nigerian Journal of Technology, [S. l.], v. 29, n. 1, p. 135–140, 2009. DOI: 10.4314/njt.291.150. Disponível em: https://nijotech.com/index.php/nijotech/article/view/150. Acesso em: 16 apr. 2026.