Ullah, Kafayat, Mohammad Arif, and Mohammad Tahir Shah. 2006. “Petrography of Sandstones from the Kamlial and Chinji Formations, Southwestern Kohat Plateau, NW Pakistan: Implications for Source Lithology and Paleoclimate ”. Journal of Himalayan Earth Sciences 39 (1):1-13. http://ojs.uop.edu.pk/jhes/article/view/1604.