?COMPOSITION, ORIGIN AND ECONOMIC POTENTIAL OF KAKUL, LAGARBAN AND TARNAWAI PHOSPHORITE DEPOSITS OF HAZARA, PAKISTAN*. Pakistan Journal of Scientific & Industrial Research. 1997;40(1-4):6-11. Accessed April 25, 2026. http://www.v2.pjsir.org/index.php/biological-sciences/article/view/2311