INFLUENCE OF RICE HUSK ASH SOURCE VARIABILITY ON ROAD SUBGRADE PROPERTIES. Nigerian Journal of Technology, [S. l.], v. 37, n. 3, p. 582–586, 2018. DOI: 10.4314/njt.373.1756. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/1756. Acesso em: 19 apr. 2026.