“?MEASUREMENT OF THERMAL CONDUCTIVITY OF MARBLE POWDER BY SPHERICAL SHELL METHOD”, Pakistan Journal of Scientific & Industrial Research, vol. 41, no. 3, pp. 164–166, Jun. 1998, Accessed: Mar. 10, 2026. [Online]. Available: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2261