“Origin of Opal-CT in Lower Eocene Tallahatta Formation, Mississippi, USA and Pleistocene Barind Clay Formation in Bangladesh: A Comparative Study: Origin of Opal-CT”, Pakistan Journal of Scientific & Industrial Research, vol. 51, no. 2, pp. 61–64, Feb. 2008, Accessed: Mar. 10, 2026. [Online]. Available: https://v2.pjsir.org/index.php/biological-sciences/article/view/620