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Effect of Used Motor Oil Contamination on Geotechnical Properties of Clay Soil on Uyo-Akwa Ibom. International Journal of Natural Sciences Research, [S. l.], v. 5, n. 2, p. 22–30, 2017. DOI: 10.18488/journal.63.2017.52.22.30. Disponível em: https://archive.conscientiabeam.com/index.php/63/article/view/2364. Acesso em: 5 aug. 2026.