Purification and exclusion of sources in libraries and information centers. Journal of the College of Basic Education, [S. l.], v. 18, n. 74, p. 529–558, 2023. DOI: 10.35950/cbej.v18i74.9365. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9365.. Acesso em: 30 jun. 2024.