KHAN, HAMEEDULLAH, VIQAR HUSAIN, KHALID QURESHI, and KAMAL PASHA. 2022. “PETROMINERALOGICAL AND GEOCHEMICAL STUDIES OF HAVELIAN BARITE, HAZARA, NWFP, PAKISTAN”. Biological Sciences - PJSIR 37 (10):414-20. https://v2.pjsir.org/index.php/biological-sciences/article/view/2733.