“?STUDIES ON THE ECONOMIC POTENTIAL OF GLASS SAND DEPOSITS OF DAU DAM DISTRICT DADU SINDH FOR GLASS MANUFACTURE”, Pakistan Journal of Scientific & Industrial Research, vol. 37, no. 3, pp. 113–116, Feb. 1994, Accessed: Jun. 09, 2026. [Online]. Available: http://www.v2.pjsir.org/index.php/biological-sciences/article/view/2593