Osakwe, S. A., & Maduako, A. U. C. (2004). RECLAMATION OF WASTE LUBRICATING OILS USING GROUND PERIWINKLE SHELL ADSORBENTS. Biological Sciences - PJSIR, 47(4), 312–315. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/1541