“PETROMINERALOGICAL AND GEOCHEMICAL STUDIES OF HAVELIAN BARITE, HAZARA, NWFP, PAKISTAN”, Pakistan Journal of Scientific & Industrial Research, vol. 37, no. 10, pp. 414–420, Jun. 2022, Accessed: Mar. 11, 2026. [Online]. Available: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2733