The Revolution and Relevance the of Online Public Access Catalogue (OPAC) in the Age of Discovery Systems in Nigeria. Lead City International Journal of Library, Information & Communication Sciences, [S. l.], v. 3, n. 1`, 2026. DOI: 10.63741/cijlics.2026.0301.3-j. Disponível em: https://journals.lcu.edu.ng/index.php/LCIJLICS/article/view/1790.. Acesso em: 26 may. 2026.