USORO, Ubon. Effectiveness of Sites and Services Schemes in Low and Medium Income Housing Provision in Nigeria. International Journal of Economic Development Research and Investment (IJEDRI), [S. l.], v. 6, n. 2, p. 39–50, 2015. Disponível em: https://icidr.org.ng/index.php/Ijedri/article/view/890. Acesso em: 19 apr. 2025.