Aman, T., A. A. Kazi, Z. Iqbal, and A. Ali. “?CHARACTERIZATION OF SPRING WATERS OF MURREE REGION”. Biological Sciences - PJSIR, vol. 43, no. 1, Feb. 2000, pp. 13-18, https://v2.pjsir.org/index.php/biological-sciences/article/view/1984.