DETERMINATION OF GSM SIGNAL PENETRATION LOSS IN SOME SELECTED BUILDINGS IN RIVERS STATE, NIGERIA. Nigerian Journal of Technology, [S. l.], v. 34, n. 3, p. 609–615, 2015. DOI: 10.4314/njt.343.983. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/983. Acesso em: 19 apr. 2026.