“RECLAMATION OF WASTE LUBRICATING OILS USING GROUND PERIWINKLE SHELL ADSORBENTS”, Pakistan Journal of Scientific & Industrial Research, vol. 47, no. 4, pp. 312–315, Aug. 2004, Accessed: Apr. 21, 2026. [Online]. Available: http://www.v2.pjsir.org/index.php/biological-sciences/article/view/1541