“?A STUDY OF PAKISTANI GYPSUM BY X-RAY POWDER DIFFRACTION”, Pakistan Journal of Scientific & Industrial Research, vol. 39, no. 5-8, pp. 110–113, Aug. 1996, Accessed: Mar. 11, 2026. [Online]. Available: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2385