COMPARATIVE STUDY ON THE EXTRACTION STRENGTH OF SOLVENTS ON TAR SAND FROM OKITIPUPA, ONDO STATE. Nigerian Journal of Technology, [S. l.], v. 43, n. 1, 2024. DOI: 10.4314/njt.v43i1.7. Disponível em: https://www.nijotech.com/index.php/nijotech/article/view/3101. Acesso em: 20 oct. 2025.