Danishwar, S., Shah, M. T., & Majid, M. (1995). Abundance of fluoride and its source in drinking water of Kheshki and surrounding area, district Nowshera, N.W.F.P., Pakistan. Journal of Himalayan Earth Sciences, 28(1), 31-37. Retrieved from http://ojs.uop.edu.pk/jhes/article/view/1473